Batman vs. Teenage Mutant Ninja Turtles (2019)

Plot hole: Joker douses everyone in Arkham with the Ooze mixed with the water sprinklers. One of the first ones to mutate is Mr. Freeze, despite wearing a suit and helmet that keep him hermetically sealed from the external environment at the 0 temperature he needs.

Sammo ★

Continuity mistake: Michelangelo gets part of his mask's tie off blown off by the Penguin, making it shorter than the other. Within minutes it's back to normal when they meet Batman.

Rob245

Plot hole: None of the Arkham inmates other than Poison Ivy should've mutated. The stuff only mutates you into a half human half animal creature, etc., if you've recently touched an animal or plant like Ivy did.

Rob245