The characters that will take part in X-Men: Apocalypse are still to be decided, but we do know that the movie will take place in the 1980s and will loosely be based on the iconic 1995–1996 comic book crossover Age of Apocalypse.
Director Bryan Singer is still quite hush hush about what the actual story-line will be and who the main players will be, but he did release a statement hinting that long time X-Men characters Gambit and Nightcrawler might appear in the film.
In an interview with Cine Premiere, the director stated, "I'm considering a Gambit and potentially a young Nightcrawler for Apocalypse. (I was) going to have Nightcrawler appear (in Days of Future Past) and even wrote a scene, but I felt that we were forcing too many mutants known history."
Gambit currently appears in The New X-Factor, a part of the Marvel NOW initiative. While Nightcrawler met his demise in the Avengers Vs X-Men mini series, his appearances in the recent X-Men comics almost confirms he will back to the Marvel Universe in no time.
Both characters are very popular with fans and critics alike. Nightcrawler appeared in X-Men: The Last Stand and Gambit had a supporting role in X-Men Origins: Wolverine, but neither character has had enough screen time to develop. There have also been talks of a spin-off film with Channing Tatum rumoured to play Gambit.