It's too late for the MCU to adapt a World War Hulk movie from the comic book crossover event onto the big screen. There are rumors currently floating around that a «World War Hulk»-inspired film of some sort could be in the works for the MCU. Some are even suggesting that this storyline could play out throughout the next few phases of the MCU and thus make the Hulk himself the new main villain.
The «World War Hulk» event takes place immediately following the events of «Planet Hulk.» In the comics, the Hulk is deemed a threat by other superheroes, namely the Illuminati, including Mr. Fantastic, Iron Man, and Doctor Strange and they send the Hulk to space where he can no longer harm himself or others. The Hulk ends up on the planet Sakaar and becomes a gladiator and, ultimately, king of the planet. When the ship he was originally sent in explodes and kills his wife, the Hulk returns to planet Earth to seek revenge on all of the heroes that sent him to space in the first place. The planet Sakaar and Gladiator Hulk have already made an appearance in the MCU in the film Thor: Ragnarok.
Related: Doctor Strange’s Multiverse Can Fix MCU’s World War Hulk Problem
Although the events of Ragnarokdidn't remain completely accurate to«Planet Hulk,» it was still the right time to adapt a version of «World War Hulk» into the MCU. The version of the Hulk in Thor: Ragnarok, where the Hulk is in total control, is the version that seems the most capable of returning to Earth and enacting some sort of revenge on the heroes of Earth. While the heroes of the MCU didn't directly send the Hulk to space, there could have been some sort of storyline revolving around this version of the Hulk resenting the other heroes and how they viewed him as a
Read more on screenrant.com