SCOOBY DOO! AND KRYPTO, TOO! (2023)

 

 

In one scene, Scooby and Shaggy are running away from Solomon Grundy in the JLA's Hall of Justice and accidentally get onto Flash's Cosmic Treadmill. The device takes them through various time periods, from prehistoric eras through to the future, where the TV series animated Legion is shown.
   Interestingly, the movie was produced by diehard Legion fan Jim Krieg, who also handled the recent Legion movie.