For 50 years, the hard-working teens (and dog) of Mystery, Inc. have been investigating the paranormal—and inspiring some wild fan theories.
Wild Scooby-Doo Fan Theory Says The Dog Is A Soviet Spy
4 Extremely Dark and Chilling Theories About Scooby-Doo
WTFAW: Scooby-Doo – Devil in the Details
Dark Scooby-Doo Fan Theories Scooby doo images, Scooby doo pictures, Scooby
15 Super Dark Fan Theories About Scooby Doo
Conspiracy theories and pot brownies: the secret history of Scooby-Doo
10 Things You Might Not Know about Scooby-Doo - Listverse
heatkopol - Blog
The Scooby-Doo Gang is Polyamorous - Fan Theory - Media Chomp
Dark Scooby-Doo Theory Turns Mystery Inc. Into The Real Villains