Of course, this all depends on when filming starts, and whos busy at the time. I don't think we have much to fear, since Marvel will have their own production company by the time this movie would start. Im saying in the next four year, pending on the wolverine and magneto movies. I'm saying that given the success of the franchise, most of the smaller actors would come back. The only people I see having a hard time with are Jackman and Berry, but I think they can be persuaded, cept if Singer comes back I highly doubt Berry will. Jackman would probally have limited screentime, a more or less cameo for fights I would guess. Famke wouldn't be that hard to write back in if Sinister was thrown in with his cloning. And it would be easy to write Scott back in since we didn't see him die, gives writers alot of leeway. As far as Gambit goes, I believe it is imperitive, mainly to please the fans if anyone can't tell. My choice is Ryan Reynolds, just cause I think he's awesome and freakin hillarious, and a mutant Van Wilder is awesome in my book, but who knows who they will go with. Oh yea, and Alan Cumming could come back, as a cameo after taking the cure,lol, I think thats about it. But how in the hell would he do Loke(sp?) in Son of the Mask, and not nightcrawler, which alot of people became infatuated over. But they could recast, it wouldnt be hard to make them look the same given the amount of makeup, just the voice has to be near the same. And I vote for more naked Rebecca in X4!