i do wonder if Cable will be in the next film. he has such a convoluted back story.
Not if he's just a soldier from the future.
It also wouldn't be outrageous to say he's Scott and Jean's future son. Would make for some awkward scenes as he meets mom and dad when they haven't even had a kid yet.
I don't think there's a whole lot I could say about the movie that hasn't been said already. I really enjoyed it. The middle lagged a bit, though. Basically, once Magneto was rescued from the Pentagon, things slowed down up until the Paris conference kicked in.
The post-credits tag was pretty awesome, even though it just hints at who the next movie is about.
As for why Apocalypse doesn't have blue lips and such--he was born looking much like you see him in the ending tag. He gains his technological prowess and trademark blue lips once he acquires and utilizes 30th century time traveler Kang the Conqueror's future technology. Kang presented himself as Pharaoh Rama-Tut and wanted to groom Nur as his heir, but the Fantastic Four stopped him. Even so, Nur had enough of Kang's technology to do his own thing with it. As far as I know, that tech is the basis for much of his power, and how he regenerates every time he is "killed."
I guess that's another detail they'd have to work around, since you can't have the FF in an X-Men film.