Marvel's vast Multiverse houses countless worlds that make up the 8th Cosmos, but five of these iconic universes are required Marvel knowledge.

The original Spider-Girl, launched in 1998 under Marvel’s MC2 imprint, starred Mayday Parker, the daughter of Peter Parker and Mary Jane Watson-Parker from an alternate, possible future.

Marvel took another crack at a possible future in 1998 with MC2, a line inspired by What If…? #105, which told the story of May Parker/Spider-Girl, the daughter of Peter and Mary Jane.