Few problems in Jean's history.  First, Iceman was not part of the original 5 X-Men.  That spot belongs to Storm (since right now Iceman is Spider-Man/Firestar's age - i.e. Junior in high school).  Also, are you having Emma Frost be on the X-Men, too?

Although I do approve the Mojoverse story-arc (I know at least one other person objected to the idea, but I don't think his characters would be really involved with that arc anyways :D).  I already have a basic idea for I want to do with Firestar and Spidey for that one. *rubs hands together and a toothy grins appears on face*  We could use the [url=http://marvel.wikia.com/wiki/Siege_Perilous]Siege Perilous[/url] in that story arc to explain how Mojo warps reality.