Scooby-Doo and Scrappy-Doo (1979 TV series) threatening cancellation for the show, whose ratings were in decline. ABC was going to choose between two shows-Scooby-Doo or an unnamed pilot from Ruby Spears Enterprises. Therefore, for its 1979–1980 season, "Scooby-Doo" was given a major overhaul, adding the character of Scooby's nephew Scrappy-Doo, voiced by Lennie Weinrib, and changing the name of the show to "Scooby-Doo and Scrappy-Doo". Although still present in these episodes, the characters of Fred, Daphne, and Velma became less essential to the plot and Shaggy, Scooby and Scrappy were the main focus. Marla Frumkin took over Pat Stevens' role as Velma Dinkley towards the end
Scooby-Doo created on-screen by computer-generated special effects. "Scooby-Doo" was a financially successful release, with a domestic box office gross of over US$130 million. A sequel, "", followed in March 2004 with the same cast and director. "Scooby-Doo 2" earned US$84 (€55,98) million at the U.S. box office. A third film was planned, but later scrapped following Warner Bros.' disappointment at the returns from "Scooby-Doo 2". As of 2013, Warner Bros. Pictures was developing a fully animated Scooby-Doo feature film with Atlas Entertainment. Charles Roven and Richard Suckle, who produced the first two live-action films, were producing the animated film, and Matt