Fan Casting Killer Croc in Batman: Arkham Asylum

Killer Croc was one of the many inmates of Arkham Island at the time of the Joker's takeover. He resided in the sewer system of Arkham where the staff fed him meat and just tried to "forget about him". When Batman was escorting the Joker through the Intensive Care unit, Killer Croc was being escorted by some of the staff, with a shock collar around his neck to keep him under control.