Doctor Doom conquers Earth and turns it into a utopia using Purple Man as his tool, with Prince Namor helping him along the way. Lots of major and minor heroes appear in this jam-packed story—lots of fun. Not sure it’s canon, though.
It ends with Doom being bored of being king and quietly stepping down.
Creator: David Michelinie and Bob Hall, “based on a concept” by Mark Gruenwald, David Michelinie, and Jim Shooter