>>115287038No, the show existed.
As I recall, Shaggy's uncle or whatever is a super scientist and is infiltrating Dr Phibe's operations, and Shaggy and Scooby basically inherit his mansion and robotic butler in the meantime.
Dr Phibe's is trying to steal the nano-tech scooby snacks that allow Scoob to do all kinds of super-power stuff, so the show has a bit of spy and espionage action going on. It's not a mystery show and doesn't purport to be.
The show had a proper conclusion as well with its 26 episode run.
Incidentally, Casey Kasem did return to do voice work for the show, but not as Shaggy, but instead as his uncle Albert Shaggleford.