It sucks that we didn’t get to see the Hulk in action in Avengers: Infinity War but we can be pretty certain that Avengers: Endgame would make up for that. You gotta wonder how they would go about doing that considering how Hulk didn’t wanna make an appearance in Infinity War despite of Bruce Banner’s wanting him to do so. One fan theory proposes something pretty interesting, something that could get the Hulk out in the upcoming Avengers film, something fairly different from the Hulk we’ve come to know in the Marvel Cinematic Universe.
u/Mr_Leeman took to Reddit to propose a pretty interesting theory surrounding Hulk’s appearance in Endgame. While doing so, he also theorized the possibility of seeing Professor Hulk or Red Hulk in the film. He highlights Bruce’s vision in the the mediocre Age of Ultron which could have played a part in why he left at the end of the film, possibly to ignore the real-life manifestation of what he saw in the vision. Perhaps he saw Black Widow dying since you know, they were basically eye f–king each other and her possible death from Infinity War could bring the Hulk back.
However, the Redditor proposes something far more cooler with possibly Bruce Banner becoming Red Hulk. This goes back to Iron-Man 3 when Extremis was introduced in the MCU, suggesting that they give Bruce the super soldier serum knockoff to bring the Hulk out. This could in turn make him… Red. Like Red Hulk. Or he could even be Professor Hulk since both Hulk and Bruce are going through a rough patch. We could possibly see the two strike a deal possibly seeing the Hulk being the Hulk but with Banner’s brains so he wouldn’t behave like a destructive moron.
Red Hulk would definitely be cool but it would be pretty funny to see how Professor Hulk interacts with the other heroes. It’s also probably gonna be a little weird seeing a big CGI thingy talking like that… Oh wait, that’s like 1/3 of the characters in the MCU, I guess it should be okay.
Avengers: Endgame is scheduled to be released on April 26, 2019