I see what you're saying and glad you agree, but for the record I've already seen people going crazy over Gravity Falls
I am just getting into the Harry Potter books, but before that I've known about Harry Potter since I was just a little kid like 4 or 5. Most people don't know about Gravity Falls good or bad. It just seems far more likely for Disney to use something that is currently still relevant, and Gravity Falls isn't anymore considering it's canceled. It just doesn't have the staying power of a movie like The Little Mermaid. An adventure, or a Cticket is possible but for even a D that seems farfetched in my mind. Glad you like it