Since 1969, Scooby-Doo has been one of the most enduring, successful and treasured Saturday morning cartoons in TV and film history. With dozens of movies and thirteen cartoon series, it's one of the best examples of a classic franchise being handed down between generations of fans. While it has undergone many incarnations and styles, the 1990s saw the greatest revitalization of the franchise since it started.
Source：https://www.cbr.com/scooby-doo-revitalized-franchise-horror-roots/
