* RecycledScript: Eagle-eyed fans have noted that Sublime is quite similar to an old ''[[Comicbook/TheAvengers 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 entires in the ''OfficialHandbookOfTheMarvelUniverse'', throwing the idea that Morrison intended them to be the same character (if he was 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 ''ComicBook/XMan''.
* [[ScrewedByTheNetwork Screwed By The]] [[ExecutiveMeddling Editors]]: When Morrison first got the book, he stated that he wanted to have a run at least as long as [[Creator/ChrisClaremont Claremont]]'s first: seventeen straight years. He lasted ''three'', due to getting into a fight with the editors over the creative direction of his character Marvel Boy. The differences proved irreconcilable, and before long Morrison did the unthinkable: [[OhCrap he signed an exclusive with DC]]. Naturally, he hasn't been seen at Marvel since, and what's more, many of the changes to the X-mythos he made were quickly retconned or swept under the rug, a move Morrison himself reportedly believes was done to spite him for leaving.
* TooSoon: A few fans saw Scott's burgeoning relationship with Emma as this. Particularly since it featured her kissing Scott over Jean's grave a day after she died...making snarky comments like [[CrossesTheLineTwice "How many times have you buried her now?" and "This must be getting rather tedious for you,"]] all the while.
** Grant Morrison originally wanted to include Rogue in the team's lineup, and planned to base her appearance and personality on her portrayal in ''XMenEvolution''.
** He 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, he gave Emma Frost her secondary diamond mutation.