Ben Affleck has taken to Twitter today to share a mysterious video which seemingly hails from the set of Justice League. While we have no idea who is in the costume, the footage offers up a first look at fan-favourite comic book villain Deathstroke in the DC Films Universe. How he’ll factor into that team-up movie is obviously hard to say at this stage.

Of course, it’s possible that this is test footage for Ben Affleck’s upcoming solo movie, though with Justice League currently shooting, it’s far more likely that this video is related to that.

This is an interesting way of revealing the character’s planned big screen debut anyway, and seeing him square off with the Dark Knight at some point in the near future is a very exciting prospect indeed. With any luck, we’ll get clarification on what this video means sooner rather than later, but for now, speculation about what Deathstroke is up to is running rampant!

Is that the Batmobile behind him? Has he been hired to break Lex Luthor out of Arkham Asylum? Will he be the lead villain in The Batman? Those are questions for another day, but for now, you can check out the awesome teaser video from the Justice League set below.