Best Alternate History Comics

East of West is Jonathan Hickman's sprawling alternate history of America, where the Four Horsemen of the Apocalypse are real and the Civil War never ended.

Superman: Red Son imagines Kal-El's rocket landing in Soviet Ukraine — an alternate Cold War where Superman serves Stalin instead of truth, justice, and the American way.

Fables by Bill Willingham imagines fairy-tale characters living as refugees in modern New York after a mysterious Adversary conquered their homelands.

X-Men: Age of Apocalypse is Marvel's definitive alternate timeline event — a world where Xavier died before founding the X-Men, leaving Apocalypse to conquer humanity.