I think the only reason this issue is a prologue to the four part Riot at Xavier's and not part one of a FIVE part Riot at Xavier's is that Quitely could only do four and not five issues in a row, and Marvel had been promising that they were saving him for a whole arc.
Jumbo Carnation, a mutant fashion designer, is dead, found outside a club called The X-Factory, which is a great name for a mutant club -- Morrison is great at naming stuff. I don't know anything about this guy, and I don't really care that he is dead, but OK, fine. People in the issue claim this is important, and I have no choice but to believe them. Morrison is telling, not showing, which is not the best option. He should have had this character be in the news from issue one.
Quentin Quire, a elitist genius with a "see through mind", hangs out with an idiot, who makes crude jokes about whether a sexy mutant can get Sophie to drop her pants -- Quentin has a crush on one of the cookoo girls. That he hangs out with this guy makes a certain amount of sense, I guess -- he is looking for people he can control and he hates people who pretend to be what they are not. He has a newspaper clipping about the "Mutant Menace" that came out the day he was born -- apparently just about the time mutants first started appearing. He calls it a pop art masterpiece, and calls some random girl "Retarda". His immaturity is being established in these pages, and when he finds out he was adopted he will begin his teenage rebellion.
Meanwhile the Beast and Cyclops are investigating the death of Jumbo. A human cop assigned to a mutant crime division is very excited to meet Beast -- he calls him Henry, and tells a story about how the Beast saved him and his pregnant wife during a mutant terrorist attack, drove them to the hospital in a tank (this may be an incident from an actual old X-Men issue, I don't know). All the Beast has to say to the guy is the caustic "all humans look alike." The cartoon friendly art does not help here. This guy is being perfectly nice, even congratulating him on coming out of the closet, and Hank is just being petty and mean for no reason -- or as part of some idiot "performance art" prank, which might be worse. A professor at the school is just as juvenile as the students.
In a conversation with Scott it turns out the Hank being gay thing spawned out as "a cruel, calculated strike at Trish Tilby's fickle heart," but, as a reporter, she leaked it to the media, so he embraced it. I do not see how his being gay was supposed to hurt her feelings, but maybe I do not get it. The Beast makes a lame argument that he might as well be gay because he has been taunted his whole life for his individualistic looks and style of dress. Lame. The mutant-homosexual thing was always a great metaphor -- don't make it literal. Then we get a conversation about the old days at the school, references to 60s X-Men issues. It seems like this should have to do with the upcoming Riot, the old versus the new, but it does not work that well. We , however, get a nice bit of foreshadowing when Scott tells Hank he is on the road to apocalyptic mind loss -- in Morrison's final story the Beast will become a version of the X-Men villain Apocalypse.
This prologue contains the seeds of what will become, in the next four issues, the only Morrison-Quitely team-up that is less than perfect, that is actually lame: The story should be old versus new, an interesting theme in a book that launched as THE NEW, the posthuman, the edgy superhero book. Like most teenagers, Quentin wants to wipe away the hypocrisy and illusions others have -- he shows the true, ugly form of a mutant who looks sexy, a moment that would have been better if Morrison had stuck with the pop-sexy X-Men idea from the manifesto: Quentin could have torn them apart on this level. But Hank is being acting like a petty teenager, and that is just an emblem of the fact that Morrison failed to make this book as edgy and "post-human" as he intended. Quentin is a petty teenager having a stereotypical rebellion -- he starts doing drugs and gets a crazy haircut. When these two groups face off instead of being the ideological battle royale it should be, it becomes hard to tell who to sympathize with the least.