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 1994). In 1993, "A Pup Named Scooby-Doo", having just recently ended its network run on ABC, began reruns on the Cartoon Network. With Turner Broadcasting purchasing Hanna-Barbera in 1991, in 1994 the "Scooby-Doo" franchise became exclusive to the Turner networks: Cartoon Network, TBS Superstation, and TNT. Canadian network Teletoon began airing "Scooby-Doo, Where Are You!" in 1997, with the other "Scooby" series soon following. When TBS and TNT ended their broadcasts of H-B cartoons in 1998, "Scooby-Doo" became the exclusive property of both Cartoon Network and sister station Boomerang. With "Scooby-Doo's" restored popularity in reruns on Cartoon Network, Warner Bros.