After about four weeks, he said, he's completed principal photography, although he may be called upon for dialogue replacement in post-production. He said that due to scheduling conflicts on the part of himself, Halle Berry, Sir Ian McKellen and Anna Paquin, the production has taken an unusual route, having to shoot all of those actors' coverage first before moving on to other things.
"It was kind of complicated...that we all has to be somewhere else at a certain time which is why the film continues in production without all of us," Stewart told the audience.
He went on to say that Professor Xavier's resurrection following his apparent death in X-Men: The Last Stand will be dealt with onscreen.
"It’s interesting, its possibly six or seven years since X-Men 3 when you will recall Charles Xavier was vaporized by Jean Grey," Stewart said. "And you are asking yourself, ‘Well if you are vaporized, how can you be in the next X-Men movie?’ Anybody got any ideas how that came about? There will be an explanation, but it was a little puzzling to me cause I thought my X-Men days were over, but not so. So something to look forward to...."
He added that he thought the film was going to outdo all of the other X-Men features and could be the big blockbuster of next year.