Contains material originally published in magazine form as What if? (1977) #1-12.

Uatu the Watcher asks some of the biggest 'What if?' questions of all - beginning with: What if Conan the Barbarian walked the Earth today? Join Sgt Fury and his Howling Commandos - in space! Consider the possibilities if someone else had become Nova! And find out what would have happened if Ghost Rider, Spider-Woman and Captain Marvel had remained villains! Stephen Strange becomes a disciple of Dormammu, Spider-Man stops the burglar before Uncle Ben is killed, and the Avengers fight the Kree/Skrull War without Rick Jones! But can you visualize a world where Susan Storm marries Namor, the Sub-Mariner? Or one where Doctor Doom becomes a hero? Plus, what if the Hulk's girlfriend Jarella didn't die - and what if the radioactive spider bit Aunt May?