Appearing on a variant cover for Invincible #135, "Gwinvincible" was an April Fools joke that merged Marvel's Spider-Gwen with Mark Grayson, protagonist of the Robert Kirkman series. Invincible artist Ryan Ottley loved the Gwinvincible crossover, which came out in 2017; he recently posted a throwback on X, calling it his "favorite April Fools joke" that the creative team did during the series' run. While Gwinvincible may have started as a prank, a real Spider-Gwen and Invincible team-up could happen one day as Kirkman and Ottley's hero has already crossed over into the Marvel Universe and worked with Spider-Man before.

Spider-Gwen is officially a member of the Invincible franchise almost. At the very least, an April Fools Joke from the franchise's creators had a version of her replace Mark Grayson as the title character Invincible, or as she was rechristened: Gwinvincible. While originating as a one-off gag, notably, considering Mark Grayson's history with the Marvel Universe,...