- There are many ways that all of the X-Men could have escaped in the Blackbird during the climax of the movie. What if Jean sacrificed herself because she knew her powers were growing faster than she could learn to control them, and she knew that she could kill everyone around her if she did lose control?
The "cosmic being" seen at the opening of X2 is the Phoenix Force.
The Dr. Shaw in X2 is Shinobi Shaw.
The novelization referred to him as Sebastian Shaw, so he could be Sebastian Shaw, Jr. in this universe.