What If 1977

What if dealt with stories in the Marvel universe if a certain thing either an event or characters history went a different way, The Watcher was featured who set up the stories, telling some backstory on how it happened on the mainstream Earth then showing a parallel one where at a certain point either due to a character changing their mind or actions that  history diverged on a different path. Some examples like the picture above if Spiderman joined the Fantastic Four or Steve Rogers never was awaken from being frozen in ice etc.

The comic had two runs, the first ended in 1984 and he second run went from 1989-1998.

The What If series is available on Amazon.
What If volume 1