Re: Why not do both? X4/First Class... Combine The Franchises!
I think it should happen. Days of Future Past:
Hugh Jackman (Future Wolverine)
Ian McKellen (Future Magneto)
Ellen Page (Future Kitty)
James McAvoy (Past Xavier)
Michael Fassbender (Past Magneto)
& the rest of the First Class cast.
Plot: Kitty travels through time from the future, sent by Magneto to stop the assassination of Xavier by a time-traveler. Cut back & forth between the future and past.