IGN: One thing that’s interesting about the alternate universe/timeline in Days of Future Past is that it could potentially give you the opportunity to revisit things that happened in the third film in terms of characters and endings that you might like to see changed.
Bryan Singer: You mean, what you’re politely saying is, “fix s**t.” Is that what you’re saying? That’s what I’m hearing. [Laughing]
IGN: [Laughing] Maybe…
Singer: There’s going to be a little of that, a few things I can repair.
IGN: Are fans going to be pleased with these things you will be repairing?
Singer: I think so, I think so, yes.
IGN: As a fan of this world too, though, do you want to see Scott and Jean return? Because it’s what everyone is thinking. That we want to see them return, you know?
Singer: Who wouldn’t? Who wouldn’t? [Laughing] That’s all I can say.
IGN: [Laughing] Fair enough.
The good news is that we’re all on the same page!
i wouldn't lose faith at the idea of cyclops and jean returning after Singer said this =)
it may not happen this film but who knows it sounds like a return is very very possible