Update 2: It's now being confirmed that Fraser will indeed play the villain Firefly. Stay tuned as the story develops.
Update: While numerous outlets have reported Fraser as playing the villain Firefly, it's also being reported that he may be playing the gangster Carmine Falcone, another staple Batman villain character, who was previously played by John Doman in the Gotham series and Tom Wilkinson in Batman Begins. The character will next appear in 2022's The Batman, as played by actor John Turturro.