Scooby-Doo! and Batman: The Brave and the Bold Reviews
This should be a fun films for kids. It's bright, funny, and a solid plot and mystery. (Although, because this film juggles so many plot points I do feel the ending was rushed a bit.)
The Scooby gang is invited to join a mystery solvers' club by Batman and several supheroes. What goes on is and adventure that manages to keep all the Scooby-Doo gimmicks but also manages to incorporate a whole lot of Batman villains. I'm especially pleased to see them bring back Aqua Man from the show, whose portrayal as a goofy, but well-meaning dad-type, made him one of the best characters.
Overall, this is a solid children's film and one of the stronger Scooby-Doo movies.