Re: Actors from original trilogy on First Class sequel with Days of Future Past
If they do use characters from the previous franchise, why does it have to involve time travel? In fact, I can tell you right now it probably wont. Expect some mystery-adventure style plot following clues from destiny's diaries, while scenes of the future and the past are intercut. While the x-men in the past are figuring stuff out, the consequences lead to events unfolding in the future. It keeps the spirit of the comic, while also doing away with the time travel aspect, which wont carry over well to film if you ask me. Also, see Senator Kelly replaced with the Kennedy assassination, ala the Cuban Missile Crisis.
At least that's what I think.