Scooby Doo And The Legend Of The PhantosaurWiki info
After attempting to develop his own version of the proposed show called House of Mystery,Joseph Barbera, who handled the development and sale of Hanna-Barbera shows while William Hanna handled production, passed the task along to story writers Joe Ruby & Ken Spears and artist/character designer Iwao Takamoto. Their original treatment, based in part on The Archie Show, was titled Mysteries Five, and featured five teenagers: Geoff, Mike, Kelly, Linda, Linda's brother "W. W. " and their dog, Too Much, who were all members of the band "Mysteries Five," including the dog who played bongos. When "The Mysteries Five" were not performing at gigs, they were out solving spooky mysteries involving ghosts, zombies, and other supernatural creatures. Ruby and Spears were unable to decide whether Too Much would be a large cowardly dog or a small feisty dog. When the former was chosen, Ruby and Spears wrote Too Much as a Great Dane, but revised the dog character to a large sheepdog (similar to the Archies' sheepdog, Hot Dog) just before their presentation to Silverman, as Ruby feared the character would be too similar to the comic strip character Marmaduke. Silverman rejected their initial pitch, and after consulting with Barbera on next steps, got Barbera's permission to go ahead with Too Much being a Great Dane instead of a sheepdog.