While the last we’d heard about the ‘big bad’ of Warner Brothers’ Birds of Prey was that it would be a Batman rogue who’s yet to appear on the big screen, now we finally have word on which nefarious sort will be butting heads with some of DC Comics’ finest females.

As per The Wrap, the Birds of Prey team will be facing off against Roman Sionis, aka Black Mask. In more recent years, Sionis has been featured in the Arkham video game series and the Black Mask moniker has even appeared in Gotham.

Going back to his roots, Roman Sionis debuted back in 1985’s Batman #386. Created by Doug Moench and Tom Mandrake, the early word on the silver screen incarnation of the rogue has him pegged as “a brutally sadistic kingpin leading a gang called the False Face Society in Gotham City’s criminal underworld who has a fixation with masks.”

Throughout the years, the villain, like many of the Caped Crusader’s rivals, has seen his place on the totem pole vary; at times being a run-of-the-mill bad guy, at others being a truly sinister presence who is capable of all kinds of twisted acts.

Over the last month or so, we’ve heard stories that the line-up of ladies joining Margot Robbie’s Harley Quinn in Birds of Prey will be Black Canary, Huntress, Detective Renee Montoya, and Cassandra Cain (although it remains to be seen which of her many mantles Cain takes on).

To be directed by Dead Pigs’ Cathy Yan, Birds of Prey is currently set to start shooting in January once Robbie is finished working on Quentin Tarantino’s Once Upon a Time in Hollywood.