Re: Possible to introduce both Sinster AND Apocalypse in an X-sequel?
Before all of this Days of Future Past talk, my idea was always that Sinister was actually present @ Alkali Lake, abducted Jean, replaced her w/ Madelyne Pryor, then used her to abduct Scott. Everything we see in X3 is actually Pryor, not Jean. Meanwhile, Sinister is at work trying to work his genetic magic in the name of his master - Apocalypse.
In an interesting twist, you could actually have Sinister working on a mutant that could defeat Apocalypse in order to free Sinister from his servitude. Or, just Apocalypse ordering Sinister to create the perfect mutant that is free of all weakness. Lots of interesting ways that could have gone.