I'm actually curious about how he plans to bring back Xavier.
Yes, it becomes apparent Xavier's consciousness was transferred to someone in the end credits tag in X-Men: The Last Stand
, but that scene was really vague and I'm not sure how many people know that... if they even stuck around for that scene after the credits.
I'm sure most regular audiences know that Xavier died at the end of The Last Stand
, so I am very curious to see how Singer plans to address that.