Hugh Jackman is gonna be (most probably) in the movie but how about Halle Berry? Is it possible and how?
My answer is it is possible because in X-men: Days of Future Past, Wolverine told Professor X to look for Cyclops, Jean and Storm.
That may not be enough but I think, young Professor X and old Professor X also shared their thoughts therefore, young Professor X has seen Halle Berry as Storm in the future.
So the moment young professor X sees Shipp/Storm, we will see Professor X thoughts of Halle/Storm in the future and tries to convince her that she will be an X-men.
What do you think?