13 Completely Dark Theories Which Fans Give About The MCU

Superhero characters are often made up in fictional movies, books, or comics in order to bring us positive messages like "Goodness always triumphs over evil" or superheroes are always good guys. That can work well for kids but not for adults.
Because we are old enough to realize some painful truths. The harsh reality has sometimes shown that if we aren't ruthless to fight for ourselves, we may be easily "killed" by bad guys.  And one more thing that comes from the reality is that no one can be good all the time.
That could be the reason why the older we get, the more sensitive and suspicious we are about things that look too good. We will give you examples of that.
Below are 13 theories revealed by MCU fans, you might never think of, but they are really dark theories. Let's see whether you agree with them or they're just overthinking.

#1 Loki works alongside Thanos

Loki is the most complex character in the entire Marvel Cinematic Universe. Whether he is a superhero or a villain, he still confuses many people. At the end of the series, many fans consider him as a good character when he supports the Avengers and fights against Thanos. However, some don't make it such simple. There is another story made up for this character that he works alongside Thanos.
Thanos used his scepter to make Loki more irrational to then control him to take more information. "Loki talks about how if he was given the scepter and a small army he can in a show of good faith cull half the population of earth and bring him another infinity stone if he helps him with Asgard and simultaneously gives him something to become a god with so he can stop people from ever being hungry by killing half the people in the entire f*cking universe." Knowing that Loki always desires for fighting his big brother, Thor, Thanos took advantage of Loki.

#2 Sam Wilson is an undercover agent possibly affiliated with Hydra

Watching the movies, we can easily see that Sam Wilson is a good character. But are we just too naive?
One fan of MCU has revealed: "It seems really coincidental that Falcon just so happens to run a PTSD group at Peggy Carter's nursing home does it not? And upon watching The Winter Soldier again it really seems like he is trying to relate and appeal to Steve, by talking about his experiences with war and such. It seems that maybe he was trying to earn Steve's trust so that he could later fall back on him when he feels out of his depth (which he does in the second act of the film).

#3 Nick Fury is in a constant state of mourning

Fury encounters Goose in 1995 and he kept her as a pet for 13 years. He really had a deep love for Goose, that's why with the death of Goose, he seems unable to open his heart to anybody again. He is trapped in a perpetual state of grief, as he is unable to move on from the tragedy, and that is demonstrated through his wardrobe.

#4 Black Widow did horrible things in Budapest

There are some clues that lead us to the theory:
When Natasha Romanov says, "It's like Budapest all over again!" Hawkeye aka Clint Barton replies: "You and I remember Budapest very differently." So, is it because they were on opposing sides in Budapest?
In addition, in Avengers: Endgame, on Vormir, Natasha says: "I don't judge people on their worst mistakes." Clint replies: "Maybe you should." Natasha quips back: "You didn't." Is it possible that Natasha, given that she originated from the Soviet bloc, did something very bad in Budapest before she was converted in her views and joined Hawkeye and his side? Is Budapest the "worst mistake" she is referring to?
Small addition: As they head to Vormir, Hawkeye says: "We’re a long way from Budapest."

#5 Peter Parker's parents died in the 9/11 attacks

If you've followed Spider-Man long enough, you will easily realize that he's got a fear of heights.
Homecoming confirms that Spider-Man is 15 years old. If Civil War takes place in its release year, 2016, Homecoming takes place two months after Civil War, and Peter is 15 years old, which means Peter Parker was born in 2001.
The theory is that shortly after Peter Parker was born, his parents died during 9/11. Once he got old enough, Uncle Ben told him about the event, which cause Peter to develop a fear of heights that didn't go away when he first become Spider-Man.

#6 Bruce Banner's suicide attempt changed his appearance

In a deleted scene in "The Credible Hulk", Bruce is trying to commit suicide by shooting in his mouth. This clearly doesn't work because as he put it in The Avengers, the other guy spits the bullet out.
The theory is that he fired the gun in his mouth, it caused trauma to his face and broke bones before the Hulk could take over and thwart the attempt. His bones healed as they were while the change was happening, changing his face, making him go from Ed Norton to Mark Ruffalo.

#7 Doctor Strange knew he had to sacrifice Tony

Doctor Strange may know that Tony would die. He becomes really upset and changes his attitude and tone towards Tony after seeing all those futures. He knows that he has to sacrifice Tony to save the universe.
There will be many other futures, but probably many people will die.

#8 Dr. Strange tries to kill Hulk several times

Dr. Strange sent The Hulk to Sakaar, the first attempt to get rid of The Hulk.
There are some pieces of evidence from fans to explain this theory. Dr. Strange always keeps a list of dangerous species. And The Hulk is definitely on the top of the list because in our doctor's eyes, The Hulk is both a giant rage monster and co-creator of Ultron.
The Hulk is too dangerous to ignore. Strange keeps a list of dangerous beings from other worlds per Ragnarok. It's not a stretch to believe he also keeps a list of dangerous humans on earth which would include Bruce Banner who as both a giant green rage monster and co-creator of Ultron is probably right at the top of it.

#9 Hydra infiltrates the United Nations

While the Avengers were busy dealing with Ultron, Hydra was thought to gather intelligence and try to control the situation without engaging head to head. It infiltrated the United Nations and made the Sokovia accords control or divide the Avengers.

#10 Hulk meets Black Widow in the soul world

When Hulk used the Mind Stone to bring everyone back, in a deleted scene we saw Tony having a conversation with his daughter. So, doesn’t it make sense that Hulk got to meet his loved one in the soul world after he used the stones?  Especially when we consider that he said to Cap that he tried to bring her back.

#11 Cap is suicidal in "The Winter Soldier"

Cap actually felt so bad, even suffered from depression when he can't deal with the new world to him, especially when he knew about Hydra and his friend Bucky. It is thought that he wanted to get himself killed while trying to save the world. It would've been an ideal ending for him. He saw a good successor in Sam Wilson and he knew that Sam would carry his mantle.

#12 Wanda accidentally awakens Arnim Zola

Wanda tried using Arnim Zola’s mind transfer tech to save Vision, but it went horribly wrong and she inadvertently resurrects Zola and creates Westview.

#13 There is nothing real in the MCU due to Dr. Strange

It sounds hilarious, but there is a theory that refuses everything happening in the MCU. All are considered to occur in Doctor Strange's mind world.