Oh right, good point about the cure. But if she were part of the X-team in the future, how could she possibly be cut? It seems impossible that she would've been a part of those fight scenes and then... not. Maybe she was originally with Charles/Erik/Logan/Storm on the plane, and somehow died at the beginning so that she couldn't be in later scenes.

See, they shouldn't have gone with the "shooting Trask will result in tons of Sentinels and a postapocalyptic future!" They should've told Mystique, "shooting Trask will result in X3!"

I assume all this means that the first Wolvie movie didn't happen either, which is helpful. (Although more-or-less the same events may have happened in a different way.) This may be the first time that a time-travel movie actually fixed continuity.