EXCLUSIVE: The gestation period for reboots seems to be getting short. Warner Bros in the early stages of launching a new Scooby-Doo. The studio made a Raja Gosnell-directed live-action comedy out of the Hanna-Barbera cartoon that starred Freddie Prinze Jr, Sarah Michelle Gellar, Matthew Lillard, Linda Cardellini and Isla Fisher as the young sleuths. The film grossed $268 million worldwide, and Warner Bros and Gosnell made a sequel two years later. Now the studio is starting from scratch, setting Randall Green to craft a new adventure. There are no other attachments at the moment beyond original producer Charles Roven, who will produce this one for Atlas.