Edge of Tomorrow"Edge of Tomorrow" is going back to some yesterday.

A sequel for the hit sci-fi action movie starring Tom Cruise and Emily Blunt has been in the cards for some time, but now director Doug Liman reveals that the follow-up will actually be a prequel.

Liman has never made a sequel (after "The Bourne Identity," he bequeathed that franchise to Paul Greengrass). So, why do one for "Edge of Tomorrow"? As he told Collider, "That is the only sequel that I'm considering doing, and it's because first of all the story is so amazing — much better than the original film, and I loved and loved the original film — and second of all, it's a sequel that's a prequel."

Christopher McQuarrie, who wrote the first movie, has said the idea for the sequel came from Cruise himself. The sequel-actually-prequel movie will be penned by "Race" writers Joe Shrapnel and Anna Waterhouse.

"I had these intellectual ideas on how you should make a sequel that are unlike how anybody else makes a sequel, and this script and this idea fit perfectly into that idea," Liman explained. "So it's gonna revolutionize how people make sequels."

It's hard to speculate what that revolution looks like. The story in the first movie involved time travel, with Cruise's character re-living one day over and over again to acquire the skills necessary to defeat alien invaders. He trained with Blunt's Sergeant Rita Rose Vrataski, known as the "Angel of Verdun" for her heroics in that battle. She also experienced the time loop there, so could the prequel follow her through Verdun? Or even go back to the Mimics' initial invasion?

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