Jeff Wadlow continues to tease fans about the upcoming X-Force adaptation, though the film won’t hit theaters until after next year’s Days of Future Past. During a recent interview with Bleeding Cool, the director revealed that the tone of the film will be edgier than its X-Men predecessors and will take a more introspective look at life as a mutant.

“Tonally, it will fit in quite well with all the other movies . . . but then I think the other movies cover a wide range of tones,” said Wadlow, who also promised that X-Force wouldn’t have the same tone as Kick-Ass. “I think it will be a little edgier. I think you’ll see some characters with different takes on what it means to be a mutant. There will be some gray areas the movies haven’t yet explored. It won’t be as overt. . . . I’m going to take some big ideas from the X-Universe and flip them, I think in an interesting way.”

Cable and Deadpool seem certain to appear, and rumors suggest that Domino, Psylocke and Colossus could round out the five-mutant team. There are also rumors that the Cable we’ll be introduced to what will be an aged Wolverine, like he is in the Ultimate version of the X-Men comics, rather than the offspring of Cyclops. Who would you like to see on the team?

Wadlow isn’t spilling just yet. “I definitely can’t tell you the lineup—we want that to be a big surprise,” the director told Screen Rant last week.

There’s currently no release date for the X-Force film. Days of Future Past will open in theaters on May 23, 2014.