I just finished watching Scooby-Doo! Mysteries Incorporated on Netflix. It is set during the teens' high school years and ends with their graduation (all 4 are in the same graduating class). In the final episode, they make plans for a cross-country mystery-solving road trip.
Ignoring the fact that a couple of the movies are live-action, does everything in the Scooby-verse occur in a single timeline? Or are there multiple timelines?