Originally Posted by Dagenspear
No. Because niether had a certain death. Cyclops died off screen suspiciously and Jean's the dang Pheonix. It's not hard to bring either back. Hell, when I wrote an X4 fan-script, it only took me three scenes with the characters. And I don't think Cyclops has been confirmed.
They are both dead. If they wanted to explain how they didn't die in the events in X3 that would take up time in an already busy movie. They could just use the given plot of changing the future to fix this. It's already built into the story. I would be shocked if they didn't go that route if they want those characters back.