@fallen_crippled: they merged two characters in one (Kitty/Rachel). They gave Rachel's chronal abilities(time travel) to Kitty Pryde as a secondary mutation. An interesting move. I liked it but I wished they introduce Rachel Summers as a hound.
I just came from seeing the movie. I believe for me that the director made a splendid movie without losing essence of the original classic story. Nice development of Mystique (i respect her more because of her actions in this movie), good acting, and the agony and last hope of the last remaining X-Men in the future that were a constant fight to change their actual apocalyptic future where was a living hell non stop. I loved the movie. I recommend it without any doubt. Note: The movie is based on the original story with a better outcome at the end. Stay after the end credits..a messiah praised, Jean is alive and the movies after X2 have been rebooted like never happened with the result of the solved movie plot!