World War Hulk was a 2007 comic book crossover storyline published by Marvel Comics and starring the Hulk.[1] The series is composed of five main issues titled World War Hulk, with Greg Pak as writer and John Romita, Jr. as penciller, and three other limited series: World War Hulk: Frontline, World War Hulk: Gamma Corps, and World War Hulk: X-Men. It also ran through several extant Marvel comics series.

The plot is the culmination of a series of events that began with the Hulk being tricked into being sent into space by the Illuminati and a life model decoy of Nick Fury, the Hulk's subsequent exile seen in Planet Hulk and his imminent return to Earth to seek revenge on the Illuminati.

Blaming The Illuminati for the explosion of a space vessel they had constructed, leading to the deaths of his wife, his unborn child and millions of inhabitants of the planet Sakaar, the Hulk, stronger than ever due to his rage, as well as the radiation from the warp core explosion, and his allies, the Warbound, come to Earth intent on revenge. First stopping at the moon, the Hulk defeats Illuminatus Black Bolt. The Hulk proceeds to Manhattan, New York City, where he demands the presence of the Illuminati and that the city be evacuated. He travels to the nearby X-Mansion, home of the X-Men, where Illuminatus Professor Xavier, absent from the decision to send the Hulk off-planet, admits he would have agreed to that but not to permanent exile. The Hulk defeats several teams of X-Men,[6] and battles the Juggernaut, but leaves after learning of the mutant population's heavy losses during M-Day. When the Hulk returns to Manhattan, the superhuman-operative team Gamma Corps battles him, but the Hulk convinces them they follow a false cause.