From the New X-Men SDCC teaser thread in the X forums:
If he's right, that means Brevoort is taking a few people with him to the X office and retconning them as mutants, like what recently happened to Ms. Marvel. Who else do we think that might happen to? Scarlet Witch and Quicksilver would be logical picks, since they were previously retconned from mutants to non-mutants. And Photon got teased in her last solo mini. Anyone else? Which ex-Avengers are joining the X-Men?