9. The Ultimates (2002-2004)
Mark Millar and Bryan Hitch’s The Ultimates gave Marvel’s iconic heroes a gritty, modern overhaul that was as divisive as it was influential. The series was noted for its graphic violence, politically charged narrative, and controversial takes on characters, especially Captain America’s jingoism and Hank Pym’s abusive behavior. Some praised its realism and fresh approach, while others criticized the darker tone and moral ambiguity. This polarizing run left a mark on both the Marvel Universe and the superhero genre.