Marvel Studios has promised thatAgatha All Alongwill have huge ramifications for theMCUthat could change the franchise forever. Following her popular debut in 2021’sWandaVision, Kathryn Hahn was quickly confirmed to be returning to the MCU as original Salem witch Agatha Harkness in her own solo series andWandaVision’sfirst spinoff,Agatha All Along.Trailers forAgatha All Alonghave raised anticipation for the Halloween-themed series, which could be far more important to the MCU than anyone first realized.
In preparation for the series premiere on Disney+ on September 18,IGNspoke to thecast and crew ofAgatha All Along, who revealed new details about the upcoming show. Notably,executive producer Mary Livanos noted that, while the series is"an incredible story in and of itself,“Agatha All Alongwill also have"ramifications for the larger MCU.“This could makeAgatha All Alongone of the most important new MCU installments, as new characters could debut, exciting storylines could begin, and unseen histories could be explored, changing the course of the MCU for good.

I would say, first and foremost, that Agatha All Along is an incredible story in and of itself. It’s all about Agatha, and we get to learn more about her and I think folks will really love her journey. But what I can also say is that there are ramifications for the larger MCU. However, we also introduced an entirely new slate of coven members who are brand new to the MCU. If you don’t know much about Marvel, you’re able to drop in and enjoy this completely original story. But if you’re a fan of WandaVision and the MCU, I will say there is a ton paid off in this series.
10The Scarlet Witch May Return To The MCU
Elizabeth Olsen’s Scarlet Witch Sacrificed Herself In Doctor Strange In The Multiverse Of Madness
Elizabeth Olsen’s Wanda Maximoff has become one of the most beloved characters in the MCU since her brief debut at the end ofCaptain America: The Winter Soldier.Her immense and continuous grief led to her inadvertently erecting the Westview Hex inWandaVision, and pushed her to desperately scour the multiverse in search of her children inDoctor Strange in the Multiverse of Madness. This Phase 4 movie marked the end of her story, as she sacrificed herself to destroy the Darkhold, but theScarlet Witch has nevertheless been rumored to be returningto the MCU.
I’m Now Convinced Scarlet Witch’s MCU Return Is All But Confirmed
New reports suggest that Marvel Studios may be gearing up to bring Elizabeth Olsen back to the MCU as the beloved Wanda Maximoff, the Scarlet Witch.
Although neither Marvel Studios nor Elizabeth Olsen have confirmed the Scarlet Witch’s return, there has been a huge amount of speculation that the Avenger-turned-villain could return inAgatha All Along.WandaVisionended with Wanda Maximoff putting a spell on Agatha Harkness, so Maximoff will be a huge part ofAgatha All Along, whether she returns or not. It seems to only be a matter of time before Olsen reprises her witchy role in the MCU, so it would be incredible and surprising to see this happen in 2024’sAgatha All Along.

9Westview Will Become Even More Important In Agatha All Along
Westview, New Jersey, Was Introduced To The MCU In WandaVision
The majority of 2021’sWandaVisionwas set in the fictional town of Westview, New Jersey. This was where Wanda Maximoff and Vision had planned to move to grow old together as a regular couple, but this wasn’t possible afterVision’s death inAvengers: Infinity War.Wanda Maximoff subsequently put the citizens of Westview through hell, playing out sitcom-style scenarios for her own benefit, but she soon realized the error of her ways and let the town go free. The Westview mystery will continue inAgatha All Along, however.
Several Westview residents are expected to return inAgatha All Along, including Debra Jo Rupp’s Sharon Davis, Emma Caulfield’s Sarah Proctor, David Payton’s John Collins, David Lengel’s Harold Proctor, Asif Ali’s Abilash Tandon and Amos Glick as a pizza delivery man.

WandaVisionsaw the Scarlet Witch trap Agatha Harkness as “Agnes,” Westview’s resident nosy neighbor.Agatha All Alongis expected to pick up three years after the Scarlet Witch’s attack on the town, so will surely detail Agnes' life in Westview as a regular human, though strange goings-on will certainly have surrounded her. This could also reveal Peters' mysterious Ralph Bohner, who was revealed to be the FBI’s missing witness in one deleted scene fromWandaVision.
8Agatha All Along Will Debut More Sorcerers In The MCU
The World Of Magic Will Expand Massively In Agatha All Along
As well as explaining more about the strange goings-on in Westview,Agatha All Alongis set to introduce huge new concepts in the world ofmagic in the MCU.Several powerful new sorcerers will be introduced, most notably forming Agatha Harkness' own coven, though a number of other witches and sorcerers are also expected to make an appearance. Among them, Kate Forbes will return as Evanora Harkness, Agatha’s own mother, suggesting Kathryn Hahn’s witch’s history will be explored in more detail.
Sharon Davis
Debra Jo Rupp
The debut ofAgatha Harkness' coven inAgatha All Alongis very exciting, especially when bringing huge talents like LuPone, Plaza, Zamata, Ahn and Locke into the MCU. The inclusion of Debra Jo Rupp’s unassumingWandaVisioncharacter is interesting, whileevery corner of the MCU’s world of witches will be represented byAgatha All Along’snew cast. This could be huge for the MCU, massively increasing the franchise’s power level, and continuing Marvel Studios' exploration of more supernatural stories, following on from recent projects.
7Joe Locke’s Rumored Character Is Huge For The MCU
Joe Locke’s “Teen” Is Speculated To Be The Scarlet Witch’s Son
Heartstopperstar Joe Locke has remained firm in the idea that hisAgatha All Alongcharacter is simply named “Teen.” However, there is a huge amount of speculation regarding who he is actually playing in the upcoming series, and Marvel Studios itself has gone to extreme lengths to hide this possible-immense reveal. The most popular theory suggests Locke will be playingBilly Kaplan inAgatha All Along,the reincarnated son of the Scarlet Witch, Billy Maximoff, who was previously played by Julian Hilliard.
Julian Hilliard played Billy Maximoff at ten years old inWandaVisionandDoctor Strange in the Multiverse of Madness, but was a construct of the Scarlet Witch’s magic and a variant from another universe in these respective appearances.

In Marvel Comics, Billy Kaplan follows in his past life’s mother’s footsteps by becoming the superhero Wiccan, with a similar power-set to the Scarlet Witch, including access to Chaos Magic.All signs point to Locke playing Billy Kaplan inAgatha All Along, down to his costume in the series' trailers, including a red top and blue headband, which is reminiscent of his comic counterpart’s superhero suit. Introducing a character as powerful as the Scarlet Witch would be significant for the MCU’s future, especially since this could play a part in setting up a brand-new superhero team.
6The Young Avengers Could Be Teased Again
Marvel Studios' Young Avengers Set-Up Has Been Slow
The superhero team in question is, of course, the Young Avengers. Soon after learning about his abilities in Marvel Comics,Billy Kaplan was recruited for the first Young Avengers team, where he met his future husband, Teddy Altman’s Hulkling, and reunited with the reincarnated form of his brother, Tommy Shepherd, née Tommy Maximoff, a.k.a. Speed, who inherited their uncle Pietro Maximoff’s gift of incredible speed. Debuting Joe Locke as Billy Kaplan inAgatha All Alongcould be the next piece in theMCU’s Young Avengerspuzzle.
The MCU’s Most Likely Young Avengers Lineup, Ranked By Power
While there are many characters who could join the MCU’s Young Avengers, the team will likely only comprise a few of the most powerful young heroes.
Several young superheroes have been introduced to the MCU in recent years, leading to the Young Avengers team finally being teased at theend of 2023’sThe Marvels. Kamala Khan’s Ms. Marvel, Kate Bishop’s Hawkeye and Cassie Lang’s Stature have been hinted at being the first three members of the team.Billy Kaplan and, possibly, Tommy Shepherd, would be formidable inclusions in the upcoming team, andAgatha All Alongcan perfectly set the stage for them to be recruited, perhaps even teasing Marvel’sChildren’s Crusadestoryline, which saw the Young Avengers hunt for the missing Scarlet Witch.

5Jennifer Kale Is Perfect To Confirm The Midnight Sons
Jennifer Kale’s Midnight Sons Protect Earth-616 From Multiversal Threats
Sasheer Zamata’s debut as Jennifer Kaleis a very exciting inclusion inAgatha All Along, as Kale is one of the most iconic witches in Marvel Comics history. Jennifer Kale has direct and clear connections to the supernatural and mystical world of Marvel Comics, having built friendships and discovered familial connections to the likes of Man-Thing, Ghost Rider and Doctor Strange, among many others.Zamata’s debut as Jennifer Kale means these connections can be established in the MCU, too, which could have huge repercussions for the franchise.
10 Ways Marvel Studios Has Already Set Up A Long-Wanted MCU Team-Up Movie
Marvel Comics' iconic supernatural superhero team has been long-rumored to be forming in the MCU, and many seeds have already been planted.
The biggest upcoming story that Jennifer Kale could tease is the formation of theMCU’s Midnight Sons team. Kale was recruited into a new Midnight Sons team during theMarvel Zombiesseries, tasked with protecting Marvel’s main Earth-616 from the zombie outbreak in an alternate reality.She was joined by Werewolf by Night, Man-Thing, the Hood and Daimon Hellstrom, most of whom have or will debut in the MCU. This means Sasheer Zamata’sAgatha All Alongrole could set her up as a future Midnight Son in the MCU, which would be fantastic to see.

4Agatha All Along Can Reveal More About The MCU’s Supernatural History
Agatha Harkness Is One Of The MCU’s Oldest Characters
WandaVisionconfirmed that Agatha Harkness was operating as a witch during the Salem Witch Trials of the 1690s.This makes her one of the oldest characters in the MCU, and creates the perfect opportunity forAgatha All Alongto explore the history of the MCU in more detail, revealing new information about the history of magic and supernatural beings. This could be significant for the development of teams like the Midnight Sons, the establishment of heroes such as theBlack Knight and Blade, and the development of more modern supernatural characters.
Since Kate Forbes is set to return as Evanora Harkness, it’s likely thatAgatha All Alongwill delve deeper intoAgatha Harkness' own history. This is especially true as Patti LuPone described her character of Lilia Calderu as a 450-year-old Sicilian witch.Agatha All Alonghas the chance to detail time periods that have never been seen before in the MCU, which can flesh out the world of the franchise better, and set up major storylines going forward, in much the same way 2021’sEternalsdid.

3Agatha Harkness Can Connect To Other MCU Heroes After Agatha All Along
Agatha Harkness Has Many Heroic Friends In Marvel Comics
Introduced to Marvel Comics in 1970’sFantastic Four #94, Agatha Harkness was originally depicted as the mysterious nanny to Reed Richards and Sue Storm’s son, Franklin Richards.It might be hard to imagine Kathryn Hahn’s sinister Agatha Harkness looking after anyone’s kids, but she already did this several times inWandaVisionto Billy and Tommy Maximoff. With Marvel Studios developingThe Fantastic Four: First Stepsfor the MCU’s Phase 6, it’s very possible thatAgatha All Alongcould hint at Agatha Harkness' future relationship with the Fantastic Four.
Franklin Richards is rumored to appear inThe Fantastic Four: First Steps, setting the stage for him to be looked after by Agatha Harkness, assuming the team move to Earth-616 in the Phase 6 movie.

Agatha Harkness also acts as something of a mentor to Wanda Maximoff’s Scarlet Witch in Marvel Comics, and a huge supporter of her relationship with Vision. It would be wonderful to see the Scarlet Witch return to the MCU to see her relationship with Agatha Harkness go from adversaries to allies, particularly since there is a lot that each can teach the other.Agatha All Alongis likely just the first step into the wider MCU for Kathryn Hahn, as Agatha Harkness has the potential to pop up practically anywhereafter breaking free from her spell.
2Doctor Doom Could Be Teased In Agatha All Along
Robert Downey Jr. Was Recently Cast As Doctor Doom
After the Scarlet Witch’s apparent demise in Marvel Comics, she is later found as an amnesiac living with Victor Von Doom in Latveria. Theories have suggested that this could also be the case in the MCU, especially after Robert Downey Jr.’s recast into the MCU’s Doctor Doom. The appearance of a mysteriouscastle inAgatha All Along’strailer, which could be Castle Doom, may have only supported this theory.This means that not only could the Scarlet Witch return in the upcoming Phase 5 series, but Robert Downey Jr.’s Doctor Doom could also be teased for the first time.
10 Reasons Robert Downey Jr. Is Perfect For The MCU’s Doctor Doom
Robert Downey Jr. is leaving Iron Man to play the MCU’s Doctor Doom, which has led to differing opinions, but the casting works for a few key reasons.
Doctor Doom has an affinity for magic and sorcery in Marvel Comics, soAgatha All Alongwould be a fantastic place to tease his existence in the MCU. If Marvel Studios hope to set upDoctor Doom as a formidable threatin 2026’sAvengers: Doomsdayand 2027’sAvengers: Secret Wars, then he needs to begin to be set up as a superior villain immediately.There’s no time to waste, which meansAgatha All Alongcould include the first mention of Doctor Doom, establishing the series as a huge turning point for the MCU.

1Mephisto Might Finally Be Revealed
Mephisto Has Been Rumored For Several Years
As well as Doctor Doom, another powerful and iconic villain from Marvel Comics has been rumored to be debuting in the MCU for several years. SinceWandaVisionkicked off the MCU’s Multiverse Saga, there have beentheories about Mephisto’s live-action introduction. Since Mephisto and the Scarlet Witch are intricately connected in Marvel Comics,it would make sense for the demon to appear in aWandaVisionspinoff such asAgatha All Along, especially when he is also rumored to have a larger role in an upcoming 2025 series,Ironheart.
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Mephisto has a direct hand in the development of Wanda Maximoff’s children in Marvel Comics, and as one of the foremost users of dark magic, it would be incredible to finally see him appear in live-action inAgatha All Along. There has been speculation thatSacha Baron Cohen may portray Mephisto in the MCU, andhe would perhaps be perfect at delivering the charisma, dryness and sinister tones of the supervillain. Debuting Mephisto inAgatha All Alongwould have huge ramifications for the MCU, certainly fitting Mary Livanos' tease for the much anticipated series.

Agatha All Along
Cast
Agatha Harkness, after the events of “WandaVision,” seeks to regain her magical powers. Joining forces with unexpected allies, including the son of an old adversary, she battles new mystical threats while uncovering hidden secrets in the magical realm.