- Creator Backlash: Grant Morrison would eventually come to agree that the whole "Xorneto" debacle wasn't that great of an idea.
- Creator Breakdown: According to the Morrison themself, the stuff with the crematoriums was brought about by Grant Morrison experiencing a time when "their loved ones were dying left and right."
- Fan Nickname: "Xorneto" for the version of Magneto that appears in "Planet X", after a retcon established that it was actually Xorn in disguise.
- First Appearance: Issue #115, which is part two of the "E for Extinction" storyline, is notable for featuring the first appearance of Negasonic Teenage Warhead, a Genoshan mutant girl with a memorably bizarre codename.
- Recycled Script: Eagle-eyed fans have noted that Sublime is quite similar to an old Avengers villain called "That Which Endures," another ancient, microscopic sentient lifeform that claimed to exist in all living things and to have guided evolution and attempted to control mutants. However, they have rather different modi operandi (That Which Endures wanted to make the jump from humans to mutants, whereas Sublime wanted to destroy mutants because it could not make that jump) and separate entries in the Official Handbook of the Marvel Universe, throwing the idea that Morrison intended them to be the same character (if they were even aware of That Which Endures at all; the story was very obscure and didn't have anything to do with the X-Men) into doubt. A somewhat similar character also appeared in the final issue of X-Man.
- What Could Have Been:
- Grant Morrison originally wanted to include Rogue in the team's lineup, and planned to base her appearance and personality on her portrayal in X-Men: Evolution.
- They also intended to have Colossus on the team, and for Moira MacTaggert to take Beast's scientist role. Their deaths in the Legacy Virus storyline prevented this, resulting in Beast being transferred over from Claremont's X-Treme X-Men. Likewise, they gave Emma Frost her secondary diamond mutation to replace Colossus' steel skin.
- Morrison also outlined some of the plots they were considering had they remained on the title. In particular, they wanted to open the School to extraordinarily-gifted humans, and explore what that would mean.
- Before Morrison was brought on, several creators pitched their ideas when the relaunch was announced. A lot of the rejected ideas were collected into X-Men: Millennial Visions, which included pitches from people like Geoff Johns, Keith Giffen, Alex Ross and Jim Starlin.
- Write What You Know: The "Riot at Xavier's" storyline was supposedly based on a playground riot Morrison witnessed in their youth.
Trivia / New X-Men