Watch Batman Unlimited: Monster Mayhem (2015) full movie.
Storyline: The Joker is aided in his Halloween quest to render modern technology useless and take over Gotham City by Solomon Grundy, Silver Banshee, Clayface and Scarecrow.
Director: Butch Lukic
Writer: Heath Corson
Stars: Troy Baker, Brian T. Delaney, Chris Diamantopoulos
More infor: IMDB