If anyone cares, Nightcrawler IS going to be in it, and he looks REALLY cool!!!
https://www.thezreview.co.uk/images/nightcrawler202.jpg
https://image.pathfinder.com/ew/dynam...64359__x_l.jpg
As for Gambit, there's no word on him. To me it doesn't look like he'll be in this round... BUT in 'Wizard's interview with Brian Singer, he says he'd like to have Beast and a "personal [favourite]", which he isn't giving a name on, in a next film!