In the pages of Marvel Comics, Wolverine has killed his X-Men teammates -- an incident that's probably too horrifying to ...

Deadpool & Wolverine was packed with cameos, but Ryan Reynolds ultimately decided against featuring characters from Marvel's worst-reviewed movie.

Marvel Comics has plenty of dark storylines that have made their way into the movies. There have been plenty of deaths, too, with even major heroes like Iron Man dying at the end of Avengers: Endgame.