Let me see, i know that several related works, spin-off and follow-up animated series have been produced
I've seen a few of the shows and movies, though I prefer the show over the movies.
I love Scooby Doo and the gang!  They crack me up! Yeah, did you know that this animated cartoon began being produced in 1969 and is still produced to this day? I didn't know it was that old. What else can you tell me? Well, You probably already know this but the cartoon series had four teenagers. Fred, Daphne, Velma and Norville, also known as Shaggy. Scoob Doo was actully the talking Great Dane Shaggy was awesome!  I had a replica of their van too - they had so much cool merchandise! That is so cool. Did you like the supernatural creatures that were supposedly involved in the mysteries they solve? I loved them. What else do you know?
Animation have produced numerous follow-up and spin-off animated series and several related works, including television specials and made-for-TV movies, a line of direct-to-video films, and two Warner Bros.–produced theatrical feature films.