Plot hole: In the DLC side mission In From The Cold there's emphasis put on Mr Freeze detonating the cryogenics generator he's been using in his research to take out militia tanks. Given they and almost all the icebergs explode it's amazing the Batmobile avoids instantly sinking into Gotham's waters.
Continuity mistake: When you find Gordon in the mall he's wearing his jacket. When you rescue him just after your final fight with The Arkham Knight he's not. Then he's got it back later at the asylum.
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.