Bryan Singer is currently hard at work prepping X-Men: Apocalypse, but it looks like he will be taking a break from that world at some point in the near future as he’s working on The Moon is a Harsh Mistress for Fox.

It’s an adaptation of the classic sci-fi novel by Robert A. Heinlein, and Arrow executive producer and writer Marc Guggenheim is writing the screenplay. The title however will be simplified to “Uprising”, and Singer will produce alongside Lloyd Braun and Thor Halvorssen. What does this mean for the next X-Men movie?

It’s hard to say, but  Singer could squeeze it in before whatever follows X-Men: Apocalypse. With Deadpool, Gambit, and The Wolverine 2 all on the way, Fox has plenty of other mutant movies currently in the works.

Heinlein’s Hugo Award-winning novel chronicles a lunar penal colony’s rebellion against the authority that controls it from earth. Various attempts have been made to adapt The Moon is a Harsh Mistress over the years, but the rights would ultimately return to Heinlein’s estate after they all failed to take off.

This won’t be the first Heinlein to receive a big screen adaptation as he also penned Starship Troopers. Paul Verhoeven’s 1997 movie was a pretty loose interpretation, but it has achieved a kind of cult status since.