Moviehole spoke with screenwriter Simon Kinberg who answered a few items on X-Men 3. Here’s a clip:
Will “X-Men 3” be about Dark Phoenix?
I’m not allowed to say, but your guess is…. it was set up pretty well in the second movie. So, that’s part of the third movie, but there’s a new plot that’s the story of the film.
What of the rumours that James Marsden mightn’t be coming back?
I believe he is now. The way I’ve written his character now – I’m trying to write him so he only has to come back for a couple of weeks. But he’s definitely a part of the movie.
Visit the link above for more of the interview.
Source: Moviehole
