Can you buy any adult Scooby Doo related merchandise at Universal studios or anywhere near universal or Disneyworld
You can buy some, but it's very limited. Scooby's in the wrong park because over at IOA they have tons of store space dedicated to brands like Beetle Bailey, Popeye, and Betty Boop, and you can't convince me those are selling like hotcakes. Scooby stuff would be at USF and look at the main studio store when you go through the main entrance along with - believe it or not - the gift shop inside Lucy: A Tribute.
Next time I go I will make not of what merchandise is available for Scooby and the gang.