Marvel's Hells Angel

The HAMC sued Marvel in the early 90s for naming a character "Hell's Angel" - the evil Mephisto's loyal servant. Mephisto killed her father and she was trapped into serving the villain. She broke free of him, but couldn't escape the biker lawsuit.

Marvel acquiesced to the club and changed the character name to Dark Angel. Another lawsuit followed after which the Dark Angel was retired by Marvel.