Marvel/20th Century Fox

Next year’s as-yet-untitled Wolverine film has (most likely) unveiled its main villain to be Mister Sinister, a mad scientist and a favorite in the Marvel Universe.

The reveal was made (and slyly spotted by Cinema Blend) during the audio commentary feature in the recent digital release of X-Men: Apocalypse. Producer Simon Kinberg and director Bryan Singer confirm during the post-credits scene that the (spoiler alert!) Mister Sinister tease at the end of the film is used to set up Wolverine 3.

For those out of the loop, Mister Sinister is known for conducting dangerous genetics experiments. Richard E. Grant, the English actor cast in the new Wolverine in an unspecified role, is rumored to be playing the part.

The new Wolverine, starring Hugh Jackman and directed by James Mangold, is out March 3, 2017. Till then, check out some awesome cosplay footage from New York Comic-Con: