Re: Mark Millar now snubbing Marvel Disney...?
But it was based off Singers previous script. They rewrote the whole thing, but characters and plots were already chosen. Mystique is as far as you can get from her comic counterpart as are the chosen mutants as the first X Team.
Avengers succeeds without seeing the previous films imo. XFC had 4 previous films before it as well, with the X1 and 2 creator behind it.