To restate my point for those of you who have decided that my perceptions on the entire Ultimate Universe are skewed because I am connecting the characters to their 616 counterparts, and as an epilogue to an AIM argument with a certain UCer...
Emma Frost is no longer with Xavier, and they seemed hostile to one another when they met up, this is where I get the idea that she's holding a grudge. Coupled with her less-than-polite mention of Xavier's school when she talked to Sunspot.
Emma Frost is gathering a school filled with mutants, where she is teaching them that they are the true humans (remember when she discouraged the use of the word Mutant?), implanting a superiority over traditional men and women. She also is putting together a SWAT team of mutants who have negative ties to the X-Men. Sunspot views them as thinking the everyday mutant isn't good enough, and has strong feelings against them (ever since Tempest). Havok hates his brother. Lorna is the illegitimate daughter of Magneto, and the key to his escape (look at the cover of the comic and tell me it doesn't imply she's being used). Jean-Paul holds no grudge against them, but has been put down by Humans for being both Homosexual and a Mutant. In his eyes some mutant killer with a gun shot him, which is easily viewed as an attack on his species, and those attacks build prejudice. Its also important to keep in mind she recruited Beast right when he was feeling most detached from the institute, right before her first plan failed.
Emma Frost also was one of the original students of Xavier, meaning before he was paralyzed, when he was working with Magneto. Something tore them apart, if she left Xavier for the man who believed in a Mutant Utopia rather than the dog eat mutant dog world he had to offer, then we have a motive for her school to be formed. Lets say she had an affair with Magneto, before the escape to the Savage Land, and then left to raise their daughter under a false name and start a new branch of the school to operate in the heart of America, under Magneto's orders.
After Magneto's capture, she would make two attempts to get Lorna near Magnus. First she tried to work with the Government, and somehow organized a Sentinel strike on her own team. Imagine if the president hadn't vetoed Lorna and she had joined the team, and then went "crazy" with a sentinel flying around. Lots of humans dead, and Lorna in captivity. That plan fails, she loses a student, and she goes back to figure out something new. It takes a few months, but she takes the easy way out and has Lorna merely kill a dozen firefighters. Note: I don't know how Lorna is being controlled, but her placement in the Triskelion is crucial to Magneto's escape...
Aside from the possibility of her telepathically controlling Lorna, i don't think any part of my idea whatsoever is deriven from who Emma Frost is in 616. I have not suggested her being involved with the Hellfire Club, and I certainly haven't made the rediculous suggestion that she would become the Headmaster of Xavier's school, I'm just saying that there is more to her, and that you can use Logic, and whats already out there to prove it.
Something bigger is happening than it seems so far. If not, then this arc is going to be boring and predictable. And keep in mind, this is all speculation. I'm probably entirely wrong. But you CANT just disregard the entire idea because you think its derived from my opinion of the 616 character.