11. Spider-Man: One More Day (2007)
One More Day pushed Spider-Man fans to the brink when Peter Parker struck a heartbreaking deal with Mephisto to save Aunt May’s life—at the cost of erasing his marriage to Mary Jane Watson. This sweeping retcon was met with widespread backlash for undermining years of character growth and narrative cohesion.
Readers and critics alike debated the ethics and logic behind such a drastic change, making it one of the most hotly contested arcs in the history of Spider-Man comics. Of course, the whole story revolves literally around Spider-Man making a deal with the devil, which sounds good until it happens. Marvel has always struggled to know what to do with Spider-Man as he ages.