In addition to reintroducing younger versions of the mutants known as Beast and Mystique, X-Men: First Class also did its part to establish a new dynamic between the two characters. Bonding over the fact that they couldn't show their true faces in public, the two of them sparked a romantic relationship that wound up getting kind of interrupted by the Cuban Missile Crisis. Unfortunately, this connection didn't really get to be explored at all in X-Men: Days of Future Past, but that wasn't actually always the case.
Speaking with MTV in promotion of his new film Young Ones, X-Men star Nicholas Hoult revealed that there were originally some scenes in Days of Future Past that further explored the relationship between Beast and Jennifer Lawrence's Mystique, but that they were ultimately cut due to pacing and continuity issues with the rest of the story. Explained the young actor,
"There were another couple of scenes which got cut, because they didn’t work technically in terms of the geography of how the movie played out in the end. Why [Mystique and Beast] would be here — when the world is about to end — and then we’ve nipped home quickly to have a good night’s sleep. Everyone was like, ‘Well, we can’t really do that.’ So there were a couple of extra scenes which got cut, unfortunately."
Of course, just because things didn't necessarily get to play out in X-Men: Days of Future Past doesn't mean that the filmmakers behind the franchise are just going to be leaving that almost-romance hanging. X-Men: Apocalypse is already set for a release date in the summer of 2016, and both Nicholas Hoult and Jennifer Lawrence will be joining that production to reprise their roles when filming begins next summer. It sounds like Hoult isn't aware of many details about the production, but he does add that he has hope for the Beastique relationship in the future. Said Hoult,
"I think they’ll try and figure out a way to develop it more in the next one."
While it's very possible that Beast and Mystique could wind up sharing a few scenes in X-Men: Apocalypse, they will have a few philosophical differences that they will need to overcome if they want to continue to pursue their romance. Beast is still very much aligned with Professor X and the work he is doing at the School for Gifted Youngsters, and Mystique is still following the Magneto mindset and preparing for the eventual war between mutants and humans. Basically, if they get together in a room, I can't imagine that the first thing they'd do is kiss.
We'll have to wait and see how it all plays out when X-Men: Apocalypse arrives in theaters on May 27, 2016.