The trailer for Batman Unlimited: Mechs vs. Mutants opens with a shot of a frozen Gotham City. A reporter on a jumbotron explains that Mr. Freeze is responsible. Mr. Freeze and the Penguin are seen escaping from Arkham Asylum. Bane and Killer Croc are shown to have been turned into giants by Mr. Freeze. It's all out war in the streets of Gotham. Robin asks Batman, "Hey, do superheroes get snowdays?"