The MCU is one of the biggest superhero franchises in history. With over twenty films, countless interesting characters, and so much source material to pull from, it's no question as to why. One of fandoms' favorite things to do is come up with fan theories, and when it comes to the MCU there are certainly a lot of them. From questions unanswered to character quirks, we managed to round up some of the most interesting fan theories surrounding the strongest Avenger.
Which The Hulk fan theory do you think is most believable? Vote up your favorites below!