Doomquest establishes which Marvel Comics supervillain, the archenemy of the Fantastic Four?
Doomquest:  One of the most popular stories of the title character, it establishes Doctor Doom as a member of his rogues gallery, a villainous counterpart who mirrors the superhero with his wealth, power armor and engineering skill. Doctor Doom: Doctor Victor Von Doom (or simply Doctor Doom) is a fictional supervillain appearing in American comic books published by Marvel Comics.
Doctor Doom