The Marvel Comics anthology series What If? tells alternate reality stories outside the mainstream Marvel Universe continuity, which the company sets on what it calls Earth-616. A number of these stories have been set on alternate Earths in the Marvel Comics Multiverse (i.e., multiple universes) for which Marvel has given official numerical designations. Volume 1 (1977–1984) What if Spider-Man had joined the Fantastic Four? (based on The Amazing Spider-Man #1) Reprinted in The Best of What If? Followed by What If? #21. Alternate sequels appeared in What If? vol. 2, #35, and Paradise X: Heralds. This world was designated Earth-772 in Marvel Encyclopedia: Fantastic Four. Spider-Man did eventually join the team as a member of the "New Fantastic Four" and, more recently, as a member of the Future Foundation. What if the Hulk had the brain of Bruce Banner? (based on The Incredible Hulk #1) This world was designated Earth-774 in Marvel Encyclopedia: Fantastic Four. What if the Avengers had never been? (based on The Avengers #3) What if the Invaders stayed together after World War II? (considered part of Earth-616, the mainstream Marvel continuity) What if Captain America had not vanished during World War II? (based on Avengers #4) What if the Fantastic Four had different super-powers? (based on The Fantastic Four #1) This version of the team reappeared in What If? (vol. 2) #39. This world was designated Earth-7712 in Marvel Encyclopedia: Fantastic Four. What if someone else besides Spider-Man had been bitten by the radioactive spider? (based on Amazing Fantasy #15) Three different stories look at what would have happened if either Peter's class bully Flash Thompson, his would-have-been temporary girlfriend Betty Brant, or publisher J. Jonah Jameson's astronaut son John, had been bitten by the radioactive spider instead. With the exception of Betty Brant, the protagonist dies in each story. A darker version of the Flash story is redone as What If? (vol. 2) #76. What if the world knew Daredevil was blind? (based on Daredevil #2) This issue also contained the first humor-based What If? in the series asking, "What if the spider had been bitten by a radioactive human?" What if the Avengers fought evil in the 1950s? Designated Earth-9904 in All-New Official Handbook of the Marvel Universe: A-Z Update #2 (2007). A version of this timeline was revisited in Avengers Forever, and yet another version made a cameo in Paradise X: Heralds. The