(Older Doomsday fan, and fan of Hetalia Doomsday works, so...)
Pre-Doomsday Comic of He-Man of DC Comics. Originally a Toy Line, and mini-comic series by Mattel and DC Comics, it tells of Prince Adam who with the 'Power of Grayskull' becomes the hero, He-Man, that combat the demon sorcerer, Skeletor, on the world of Eternia.
A TV series by Filmation was barely off the ground when World War 3 took place.
For a time, He-Man and his line, Masters of the Universe, was simply among ruined toys and bits of artwork of a begone world, He-Man and his characters found life with American Comics/American Entertainment being among the rights they pick up, seeing an new line of comics and even a TV-Series with great popularity.