Originally Posted by Silvermoth
The tricky thing about nightcrawler is having him turn up in a way that doesn't discredit the fact that the xmen first met him in x2.
But X2 is no longer relevant to the new timeline that was created with DOFP. With Jean alive at the end that means at least X2 and X3 never happened.
So they can introduce Nightcrawler in Apocalypse and it wouldn't contradict a single thing.