The Mystery Inc. gang and the DC superheroes team-up again since the 'Batman: The Brave and the Bold' crossover, and to celebrate 25 years of Scooby-Doo's first direct-to-video outing 'On Zombie Island'. In this case: the Justice League has mysteriously vanished and a terrifying phantom has taken up residence in The Hall of Justice. Now it’s up to Scooby and the gang to solve the mystery and save our heroes… with a little help from their new pal - Krypto the Superdog! Cecilia Aranovich Hamilton directs from an adaptation by T.K. O’Brian; Based on Scooby-Doo! characters created by Hanna-Barbera Productions, and on characters from DC - including Superman and Batman. Producers: Rick Morales and Jim Krieg; Executive Producer: Sam Register. from Warner Bros. Animation.