Watch Scooby-Doo!: Mask of the Blue Falcon

Scooby-Doo and the gang head to a comic book convention where they see some of their favorite heroes including the Blue Falcon. During a presentation, an evil monster appears and unleashes havoc on the convention. It's up to Scooby, Shaggy, Fred, Velma, and Daphne to solve the mystery and discover the person that is trying to destroy the legacy of the Blue Falcon.