In the new issue of Empire magazine we spoke to Bryan Singer about the work he's doing on X-Men: Days Of Future Past, and he had a few tidbits to give us on what's in store for his prequel-sequel. "It's epic. I don't think people realise how big this movie's going to be. We get to bring both casts together."

But, Singer assures us, it's still going to be coherent. "We've cracked it in a way that it makes sense. I had a two-hour conversation with James Cameron about time travel, string theory, multiverses and all that. You have to create your rules and stick wtih them. That's why Terminator and Back To The Future work so well. And there are certain mechanisms in X-Men, certain powers, perceptions and characters, that make this possible."

Start speculating now on which powers and which characters he means by that! His answer might depend on how closely he's sticking to the original comic.

"It has a lot of aspects of the comic. The actual comic of Days Of Future Past had a whole ton of stuff going on, so it’s like any of these things; you have to distill it. But I think the fans will be pleased that some of the most exciting parts of Days Of Future Past are going to be connected to this movie."

We also asked how much attention he's paying to the other X-movies, which have at this point created a somewhat tangled chronological web. "I’m taking into account every movie – I’m not just grabbing my first two movies and First Class and smashing them together. I’m taking into account the entire universe as it’s been laid out so far on the screen, and really respecting it and trying to work with that. People took things in various directions, so there’s some clean-up. But ultimately I’m not just ignoring them either."

Singer assured fans that he will be making his casting announcements directly on his Twitter account, as we saw this weekend with the news that Shawn Ashmore, Anna Paquin and Ellen Page are returning. "I’ll be using Twitter as an avenue. I think Twitter is an amazing thing. Very often something gets out there in the rumour-sphere, and people start building up an impression of something that might not be right. So what I want to do is just little by little drop out whatever information is official."

Finally, we asked if there'd be a repeat of First Class' terrific use of the PG-13 F-bomb. "We’re going to have another one in this one. We have another one coming up!"

X-Men: Days Of Future Past is due onscreens on July 18, 2014, with shooting set to start soon. For more from Singer and a huge amount on The Wolverine, due July 26 this year, pick up the new issue of Empire on Thursday.