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 its reruns were removed from the ABC lineup the following March, no new "Scooby" series aired on the network for the next two years. Hanna-Barbera reincarnated the original "Scooby-Doo, Where Are You!" cast as elementary school students (a common trope in 1980s children's TV) for a new series titled "A Pup Named Scooby-Doo", which debuted on ABC in 1988. "A Pup Named Scooby-Doo" was an irreverent re-imagining of the series, heavily inspired by the classic cartoons of Tex Avery and Bob Clampett, and eschewed the realistic aesthetic of the original "Scooby" series for a more "Looney Tunes"-like style, including an