Fan CastingThe Batman: Arkham Origins

Batman learns of a breakout at Blackgate Prison led by Black Mask that has taken Commissioner Gillian B. Loeb hostage. Arriving at the Prison, Batman discovers a ferocious humanoid crocodile like creature calling himself Killer Croc aiding Black Mask. Tracking Black Mask and Loeb to the execution chamber, Black Mask states that he's starting a clean slate, of which Loeb is not a part. Simultaneously releasing Calendar Man and killing Loeb in his place, Black Mask makes his escape while Killer Croc fights Batman. Defeating Croc, Batman threatens to break his teeth while Croc mockingly explains that Black Mask has set up a contest of sorts inviting 8 of the world's top assassins to kill Batman in one night for a $50 million dollar bounty. Escaping the GCPD as they retake the prison, Batman goes back to the Batcave to analyze the data from a drone he found in the prison and learns that including Killer Croc there are a total of 8 assassins trying to kill Batman: