Continuity mistake: Mr Freeze's ship just appears out of the clear blue rather than having been anchored all night when you can play "In from the Cold."
Batman: I am vengeance. I am the night. I am Batman.
More trivia for Batman: Arkham Knight
Question: Except for Two-Face, Killer Croc, Scarecrow and Jervis Tetch, why were the rest of the villains redesigned?
Answer: Probably because different people were working on the game. Scarecrow and Croc also have different looks if you've played Asylum, City, and Origins, they look different here too.
Rob245
Croc's redesign is easily explainable as it's revealed in this game that his mutation is accelerating.