Scooby-Doo the head story editor on "Scooby-Doo" since 1983. Following the first season of "A Pup Named Scooby-Doo", Ruegger and much of his unit defected from Hanna-Barbera to Warner Bros. Animation to develop "Steven Spielberg Presents Tiny Toon Adventures" and later "Animaniacs", "Pinky and the Brain", and "Freakazoid!". From 1987 to 1988, Hanna-Barbera Productions produced "Hanna-Barbera Superstars 10", a series of syndicated TV movies featuring their most popular characters, including Yogi Bear, Huckleberry Hound, The Flintstones and The Jetsons. Scooby-Doo, Scrappy-Doo and Shaggy starred in three of these movies: "Scooby-Doo Meets the Boo Brothers" (1987), "Scooby-Doo and the Ghoul School" (1988),
Scooby-Doo! WrestleMania Mystery speculation as to his appearance in the film. In the UK, the film was released on August 8, 2016. "Scooby-Doo! Frankencreepy" was released on August 19, 2014. Scooby-Doo! WrestleMania Mystery Scooby-Doo! WrestleMania Mystery is a 2014 direct-to-DVD animated comedy mystery film, and the twenty-second film in the direct-to-video series of Scooby-Doo films. It is a co-production between Warner Bros. Animation and WWE Studios. The film features Scooby and the gang solving a mystery at WrestleMania. It was released on March 24, 2014 in the United Kingdom and on March 25, 2014 in the United States by Warner Home Video. Scooby-Doo