Adults???
Are the movies that follow this one prequels? Because in the later movies and in "What's New, Scooby-Doo" they seem a lot younger... Where in this one, they seem like adults, I mean Daphne is a Talk-show host, Fred is a producer, Shaggy is an ex-customs clerk and Velma is a bookstore owner... Now, those don't seem like jobs that are passed out to teenagers...
Mike Newell's "Goblet of Fire"