The director described this film as a 'love letter to Hannah-Barbera' but there wasn't much love in the making of this movie.
The voices of the Mystery Inc. gang were terrible. They should have cast the voices they already had from the Scooby-Doo franchise, but they didn't.
If they wanted a superhero plot to be the focus of the story, they could have made a Blue Falcon film without forcing the Scooby-Doo characters into a movie that they clearly don't belong in.
The only saving grace to this movie was the sarcastic Dynomutt and the occasional zingers provided by Dick Dastardly. Unfortunately, none of those characters really meshed well with the misleading title of 'Scoob!'