Mystery Solvers Unite!

Mystery Solvers Unite! is an animated crossover film produced by Warner Animation Group as the tenth film in the Warner Bros. Hanna-Barberaverse. It is a crossover with various Hanna-Barbera characters.

Plot
When we last left George Jetson, he went back in time to retrieve his old friend Rosie the Robot. But he to travel to many places and it took a while. When he finally reached his destination, he was shocked at what he saw: people running in terror as Dynomutt and the Blue Falcon battled--and eventually got abducted by--the mysterious Mr. Hyde and his new ally, Rosie. Evading capture with help from living vehicle Speed Buggy, Jetson races against the clock to assemble various citizens who he believes could help him. Joining George and Speed Buggy are the following: master detectives Scooby-Doo and Jabberjaw, prehistoric fighter Captain Caveman, and crafty trouble-makers Tom and Jerry. Their mission: find Mr. Hyde, free Rosie, and save the town. They're not the best team, but they may be the only thing standing between Mr. Hyde and potential world domination.

Cast

 * Frank Welker as Scooby-Doo, Jabberjaw, Tom, Jerry, Speed Buggy and Dynomutt
 * Jim Cummings as Captain Caveman
 * Jeff Bergman as George Jetson and Fred Flintstone
 * Ben Affleck as the Blue Falcon
 * TBD as Mr. Hyde
 * Tress MacNeille as Rosie the Robot

Trivia

 * Fred Flintstone has a cameo in the film.
 * Speed Buggy has a minor role in the film.
 * It is revealed that Rosie was forced to help Mr. Hyde because she didn't want to be destroyed, but at the same time she wasn't ready to go back home because she wanted to be more than a maid.