Ellen Page was perfectly cast in the role of Kitty Pryde in X-Men: The Last Stand. She was one of the better aspects of the film, and I would have liked to see more of the character. I never would have thought there was almost a spin-off movie for the character, however. If FOX would have stayed the course with their X-Men Origins movies, then that's a movie that would have most likely happened. The news came from Juno director Jason Reitman in an interview with /Film; he said he was in talks with the studio to direct a Kitty Pryde movie, Page would reprised her role, and it would have been written by Diablo Cody (Juno, Evil Dead).
So basically the whole Juno team would have reunited for the film, which actually could have turned out pretty awesome. Page was blowing up at that time so it would have made sense to do this movie. Since then her popularity has kind of died down, but she is set to return to her role in X-Men: Days of Future Past, so that's going to be cool!
Joss Whedon wrote a few great storylines for Pryde during his Astonishing X-Men run so there was definitely some good stories to choose from. Would you have liked to see a standalone Kitty Pryde movie with this talent involved?