"X-Men: Apocalypse" director Bryan Singer discussed the quantum physics behind time travel in the "X-Men" universe and why anything can change, including Wolverine's glimpse of a New Future in "Days of Future Past," during an interview with Collider.
"It's not leading necessarily toward exactly where we found Patrick Stewart and the 'X-Men' at the beginning of 'X-Men 1,'" he explained. "There are some things that lead in that general direction, that was part of the philosophy we had at the end of 'Days of Future Past' is that you can't fully change the course or current of the river, but you can just divert it a little bit, and we diverted it a little bit. So some things will be surprises; people could die that were alive in 'X-Men 1,' '2' and '3,' or people could survive that died during '1,' '2' and '3.'"
"The idea that time is like a river. You can splash it and mess it up and throw rocks in it and shatter it but it eventually kind of coalesces and this is, again, quantum physics theory. It's all based in quantum physics," he continued.
"So what I'm doing with these in-betweenqueels is playing with time's immutability and the prequel concept, meaning that yes, we erased those storylines and anything can happen. That means the audience goes into the movie thinking that anything can happen. I mean anything, anyone could die. Any possibility could occur, but characters are still moving towards their immutable place," he revealed. "Jean and Scott, are they meant to be together? Is Scott, this guy who hates schools and hates authority, destined to become a leader? You don't know. Is Jean ever going to discover the full potential of her power? You don't know, but we move in those directions character-wise but then we have the freedom story-wise to do whatever the fuck we want because we erased those three movies."
As to the New Future Wolverine saw at the end of "Days of Future Past," he said, "I'll kill any of those characters any day I want. They're all fair game. Anything can happen. When two things are happening simultaneously in quantum physics it's what's called the Super Position and when the Observer finally observes the outcome that's called the 'Collapsing of the Super Position' which is what happened when Wolverine woke up and saw all the happiness. So yes that is the outcome we hope for, that is the outcome we aspire to, and that's the outcome we are moving towards, but we saw in 'Days of Future Past' another dark world. What says that can't happen again? What says the awakening of a being that has such power and can acquire the power to destabilize that? So anything is possible."
Directed by Singer and starring James McAvoy, Michael Fassbender, Jennifer Lawrence, Sophie Turner, Olivia Munn, Oscar Isaac and many, many more, "X-Men: Apocalypse" arrives in theaters May 27, 2016.