An X-Men/Fantastic Four crossover may be in the works. Director Bryan Singer has confirmed that talks are underway for this potentially exciting film, which would combine two well-loved comic book movie franchises.

Singer told Yahoo Movies: “Those ideas are in play. That would be a natural match-up, because they’re both ensemble films and there is a natural mechanism by which to do it. It deals with time. That’s all I’m going to say.”

Could Singer’s cryptic comment about “time” refer to the inclusion of parallel universes in the Four storyline? This might explain how the superheroes could meet.

One thing that might increase the likelihood of this crossover project is the fact that the two films share a screenwriter/producer in the very accomplished Simon Kinberg.

There have been rumors about production problems with the upcoming Four reboot. Referring to that movie and his own highly anticipated feature X-Men: Apocalypse, Singer remarked simply, “We’ll have to see how the films turn out,” then explained, “To just say you’re going to do it would be a mistake. You have to see how the films evolve before you make that decision to completely commit to that.”

X-Men: Apocalypse, reputedly the final installment of a trilogy, will be released on May 27, 2016. But fans won’t have to wait nearly as long to learn the fate of the so-called “troubled” Fantastic Four reboot. That film, starring Miles Teller and Kate Mara, will hit theaters Aug. 7, 2015. According to reports, the possibility of a crossover hinges on the success of those two titles.