Scoob! followed by Scoob! Holiday Haunt
Future
Canceled sequel
In June 2021, Cervone said that a follow-up to the film was in development. 
On December 22, 2021, HBO Max released a sizzle reel featuring a first look at a Christmas sequel film, titled Scoob! 2: Holiday Haunt, which was set to be released on the service in December 2022. The film takes place after the events of the first film, with Welker and the adult actors from the previous film reprising their roles while Cervone returned to write the film with Paul Dini as well to produce the project. The film was co-directed by Bill Haller and Michael Kurinsky and had a production budget of $40 million. On August 2, 2022, Warner Bros. Discovery canceled its release, citing cost-cutting measures and a refocus on theatrical films rather than creating projects for streaming. Tony Cervone would go on to say on the same day that the project was "practically finished". Later that month, it was reported that the film would still be finished, even though Warner Bros. Discovery had no plans to release it. The film was finally finished on November 4, 2022 after the cancellation.