Batman Unlimited: Monster Mayhem

In this action-packed animated superhero film, the Joker unleashes a monster of chaos on Gotham City for Halloween. With the help of Solomon Grundy, Silver Banshee, Clayface, and Scarecrow, he takes over the city's technology and declares himself mayor, with the villains in his cabinet. The heroes - including Batman, Nightwing, Green Arrow, and Cyborg - band together to stop the Joker's evil plan, but not before they must face their own personal demons and navigate a virtual world created by Professor Ivo's AI.