The first Phase of theMarvel Cinematic Universehad some seemingly innocent moments that have gone on to become quite dark in the context of the longer series. Compared to otherfilms in the MCU,Phase One was quite darker in tone, not yet touched by the sanitization of Marvel Studios under the Disney banner. Yet later films have managed to put a great many beats from the first five films into a more somber perspective, darkening the early franchise even more.

There are several ways later events in the Marvel Cinematic Universe have put specific scenes from Phase One into a jarringly darker context. Sometimes, it’s mere convenience that puts certain events into a darker perspective when compared to the laterdarkest moments of the MCU. More often than not, however,the series is very deliberate about the story beats it seeded early one, paying them off later with some heart-breaking revelations.

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10"I Am Iron Man" Got Better & Darker Years Later

Iron Man (2008)

Perhapsthe single most iconic line read in the entire Marvel Cinematic Universe, Tony Stark’s admission of being Iron Man at the end of his debut film sent shockwaves through the franchise for years to come. Not only is it impressive thatRobert Downey Jr. improvised the line, but it did away with secret identities (for the most part) being a central element of the MCU’s drama. As ofAvengers: Endgame,the quote “I am Iron Man” gained even more grave significance.

Iron Man’s Best Quotes From Each of His MCU Movie Appearances

Iron Man has made a huge impact on the Marvel Cinematic Universe with his words, with each movie appearance featuring its own standout line.

After Thanos seemingly is about to get away with performing his snap with the Infinity Stones for a second time, he smugly declares “I am inevitable”, only to realize Iron Man pickpocketed the stones from under his nose. In response,Tony repeats the same line he said at the press conference all those years agobefore snapping away the Mad Titan along with his army. Looking back, the original line has now become a chilling portent of Tony’s own death.

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9Thor’s Early Conflict With Odin Constantly Looks Different In Hindsight

Thor (2011)

Thor has had quite a tumultuous journey throughout the Marvel Cinematic Universe. While the God of Thunder may have once been a confident warrior, his banishment to Earth and the enchantment of Mjölnir to only allow itself to be lifted by the worthy was merely the beginning of his long road to humbleness.

Odin’s distaste for Thor’s reckless behavior, which prompted this response, seems all the more grave considering what he knew to be coming in later movies.InThor: Ragnarok,Odin reveals that he seemed to know his time was coming, and with his death would come his tyrannical secret child, Hela.

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Odin seemed to be ashamed of his bloody past, hoping Thor could become the peaceful, benevolent, yet strong ruler he never was before Hela’s arrival.

A painful ghost of Odin’s past life as a vicious conqueror himself, Hela being on the horizon makes it more obvious why he was so desperate to mature his son into a wise, capable, and kind leader. In hindsight, Odin seemed to be ashamed of his bloody past, hoping Thor could become the peaceful, benevolent, yet strong ruler he never was before Hela’s arrival.

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8Loki’s Debut Got Darker & Darker As The MCU Continued

The Avengers (2012)

Few figures in the Marvel Cinematic Universe are as tragic as Loki, the God of Mischief. Despite being the earliest multi-movie villain of the series, as early as his first appearance, Loki is given some sort of sympathy by the narrative, presented as someone who could’ve been a much kinder god under different circumstances.

His story only becomes more tragic with the later implication that he may have been being manipulated by Thanosinto committing the atrocities he does inThe Avengers.According to one theory,Loki was mind-controlled by Thanos, at least partially, into invading New York inThe Avengers.

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Using the Mind Stone as a conduit, Thanos was supposedly able to convince Loki to invade Earth with his Chitauri Army, setting into motion the events of the Infinity War. The MCU has since confirmed this theory as being accurate, making his villainous appearance in the first crossover thing far more terrifying than it originally seemed.

7Iron Man’s Journey Through The Portal Began His Dark Paranoia

If it weren’t for Iron Man, it’s tough to say if The Avengers would’ve won the Battle for New York in their debut film. Directing a massive missile into the portal opened by the Chitauri, Iron Man was able to detonate the powerful warhead directly on the aliens' mothership, disabling all of their cybernetic warriors in one fell swoop.

Tony has a terrifying near-death experience as his systems wink out, barely managing to fall back through the portal before it closes through sheer luck.This event went on to give Tony Stark significant PTSD, the symptoms of which were explored in the underratedIron Man 3.

Avengers 5 Concept Poster

Not only that, but his experience in space and brush with the aliens' leadership made him more fervent than ever to create a “suit of armor around the world” that could protect the Earth from future invaders such as Thanos. This idea eventually gave way to the creation of Ultron, another event that nearly destroyed the planet.

Captain America: The First Avenger (2011)

Though it might not have seemed like it at the time, Bucky’s “death” inCaptain America: The First Avengerhas had some of the darkest and widest-reaching effects of any event in the entirety of Phase One. Steve Rogers' childhood friend, Bucky Barnes became a highly-decorated sniper and special ops soldier who got the chance to fight alongside his old buddy in the Howling Commandos.

However, this career would end in tragedy as his botched rescue led to his apparent death and capture at the hands of HYDRA.Under HYDRA’s cruel experimentation, Bucky becomes the Winter Soldier, an event that went on to have a tremendous impact on the rest of the series.

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Most importantly, The Winter Soldier’s murder of Howard and Maria Stark specifically played a massive role in the split of The Avengers inCaptain America: Civil War.Knowing what the future has in store forBucky’s MCU journeymakes the sight of him disappearing into the snow inCaptain America: The First Avengera chilling one indeed.

5The Tesseract Turned Red Skull Into An Immortal Guide

It isn’t just heroes in the MCU who are thrown into bizarre, painful circumstances, especially inCaptain America: The First Avenger.Red Skull is far from a sympathetic villain, a Nazi and HYDRA agent obsessed with harnessing the power of ancient artifacts like the Tesseract.

However,it’s not fun to imagine the reality he experienced after being teleported across the cosmos by the very power he sought to control. According to Red Skull inAvengers: Infinity WarandAvengers: Endgame,the Cosmic Cube turns him into an almost spiritual guide, clad in flowing robes that, when added to his skeletal visage, gives the appearance of an avatar of death.

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It’s hard to imagine what he went through being bent, seemingly unwillingly, into a mouthpiece for the Infinity Stones themselves. The decades of isolation on Vormir can’t have been pleasant, with only unworthy seekers of the Soul Stone and alien rocks to keep his sanity from fraying more than his clothes.

4Loki’s Words At The End Of Thor Are Echoed In His Own Finale

Once again, Loki’s tragic journey through the MCU colors his early appearances in tragedy. Nowhere is this more intentional than with the ending ofThor,Loki’s very first appearance in the franchise, which eventually ends up echoing his last.

Dangling from the Bifrost Bridge,Loki begs his father for understanding, insisting that he only did what did for the benefit of all of Asgard, stating “I did it for you, for all of us”. Loki ends up saying the exact same words to his new friends inthe season finale ofLoki, which deliberately references Loki’s Phase One appearances.

Not only does the finale’s title,Glorious Purpose,evoke Loki’s words inThe Avengers,“I am burned with glorious purpose”, but he ends up repeating his same line from the ending ofThor.It’s truly tear-jerking to watch Loki go through his early struggle for acceptance and recognition, knowing where his path through the series ultimately leads him.

3Iron Man And Black Widow Are The First Two Original Avengers To Meet, And The First To Die

Iron Man 2 (2010)

Easily the most-disparaged movie of Phase One, it’s no wonder thatIron Man 2isn’t exactly drowning in poignant scenes that remain relevant far later into the MCU’s history. But if there’s one moment in the film that’s almost hard to watch with the knowledge of future films, it’s Black Widow’s introduction.

The scene is quite playful and humorous in a way the MCU most likely wouldn’t attempt now, withTony Stark meeting Natasha Romanoff under her fake identity, clearly smitten with her good looks and skills. Though it isn’t celebrated with much fanfare, this moment marks the first time in the MCU that two Avengers actually meet.

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Sadly, Black Widow and Iron Man are not only the first two original Avengers to meet, but also the first two to die, both perishing inAvengers: Endgame.It’s tough to see Natasha (or Natalie, as she goes by here) and Tony Stark meet so casually knowing the tragic history they’d both share in the later Infinity Saga.

2Black Widow And Hawkeye’s Budapest Reference Became Way Darker Than It Seemed

Almosta recurring gag in early phases of the Marvel Cinematic Universe, Hawkeye andBlack Widow’s infamous botched mission in Budapestis referenced several times. The first of these references occurs in the Battle for New York, in which Black Widow remarks to Hawkeye about the similarities between the two missions, only for Hawkeye to coldly shut her down, claiming that the two of them remember it differently. It’s only inBlack Widowthat the true context of the Budapest mission is finally revealed.

As it turns out,Budapest was a true low point in both the careers of Black Widow and Hawkeye. Being the mission of good faith that finally allowed Natasha Romanoff to defect from the Black Widow program, in Budapest, the two detonated explosives that assassinated the man behind the Red Room, General Dreykov, alongside his innocent daughter. Even if Antonia ended up surviving and becoming Taskmaster, hearing Black Widow reference the event so callously inThe Avengersmakes Hawkeye’s response quite understandable.

1Tony’s Weapons Testing Is Put Into Perspective By Wanda And Pietro Maximoff

Part of what made the early MCU work so well was Tony Stark’s captivating arc from uncaring war profiteer to selfless hero. In the opening moments ofIron Man,Tony’s ego goes on full display as he tests one of his latest “Jericho” missiles, holding out his arms like a vengeful god as the shockwave from the explosion roils around him.

It takes a near-death experience at the hands of the Ten Rings for Tony to realize the error of his ways, but shots like the Jericho missile testing make it clear in hindsight that Tony has real blood on his hands.

It’s a captivating image, but it’s important to remember that weapons like these had a very real effect on the lives of other characters in the series, even other Avengers. InWandaVision,the truth behind Scarlet Witch’s words inAvengers: Age of Ultronis shown, watching as aStark Industries bomb lodges itself in her home, nearly killing her and her brother.

It takes a near-death experience at the hands of the Ten Rings for Tony to realize the error of his ways, but shots like the Jericho missile testing make it clear in hindsight that Tony has real blood on his hands. Complicated characters like this are a huge part of what made the earlyMCUso successful.