World War Hulk is a 2007 Marvel Comics crossover event, written by Greg Pak and illustrated by John Romita Jr., where the Hulk returns to Earth seeking vengeance on the Illuminati (Iron Man, Mr. Fantastic, Doctor Strange, and Black Bolt) for exiling him, leading to a brutal war against Earth's heroes after his pregnant wife is killed on the planet Sakaar. The main story is told through a five-issue miniseries and tie-in issues in other Marvel titles, chronicling the Hulk's rage-fueled return with his Warbound allies to tear the planet apart.