Peter Potamus, Time Traveler

Peter Potamus, Time Traveler is an animated film produced by Warner Animation Group and based on the Hanna-Barbera character Peter Potamus. It is the fourth film in the second phase of the Warner Bros. Hanna-Barberaverse and the fourteenth film overall.

Plot
Peter Potamus is a hippo who discovers that his father had a magical time-traveling balloon. So, Peter and his monkey friend So-So use it to travel into World War I. However, it doesn't take long before they catch the attention of a corrupt pilot named Dread Baron and his dog sidekick Mumbly. They must find a way to travel back to the present.

Cast

 * Chris Edgerly as Peter Potamus
 * TBD as So-So
 * TBD as Dread Baron
 * Frank Welker as Mumbly
 * TBD as Colonel Fusby
 * TBD as Touché Turtle
 * TBD as Dum Dum
 * TBD as Yippee
 * TBD as Yappee
 * TBD as Yahooeey

Trivia

 * Dread Baron and Mumbly are from Scooby Doo's All-Stars Laff-A-Lympics.
 * In the film, it is revealed that Dread Baron and Mumbly are ancestors of Dick Dastardly and Muttley respectively. This was not the case in Scooby-Doo's All Stars Laff-A-Lympics, as Dick Dastardly and Dread Baron were brothers.
 * Peter Potamus and So-So meet a few different Hanna-Barbera characters as they time travel.