Netflix Scooby Doo's teaser has dropped but fans are already questioning the casting of its lead pup. Scooby-Doo: Origins was first announced by Netflix in March 2025 with fans thrilled at the news of an eight-episode live-action series about Shaggy's first mystery with his new best friend Scooby Doo. Now a first-look teaser has arrived, showing something lingering in the bushes, watching a teenager in a stripey shirt before he pounces, with the brown puppy attacking the youngster with licks.