I felt that one should be in a trilogy and Days of Future Past should be the finale of that story.
I would have done a film in-between where you meet the young Wolverine and a new character, and then in Days of Future Past became the young Wolverine and the old Wolverine and just really blow it out.
And, second, I didn’t want to do Days of Future Past next.
And on Days of Future Past, even though I co-wrote the bloody thing, the reason I bailed out of it is two things: First, I respect Bryan Singer hugely and X-Men is Bryan’s world and I feel he let me play in his sandbox.