When villains from both of their worlds unite to wreak havoc in the 21, batman teams up with the Scooby gang. Including DC villains such as Harley Quinn, Catwoman, the Joker and the Riddler alongside heroes such as Aquaman, Black Canary, and Plastic Man. Also featuring classic Scooby-Doo villains such as the Ghost Clown, Miner 49er, and Space Kook.