There are tens of thousands of adults who would shell out for an official high-polish weekend Star Wars LARP, which is what this was. The appeal was never in doubt, but you LARP once and then if you go again there's an expectation of a new experience.
My point was more about the solo part. I just can't picture anyone wanting to have this experience alone. It feels like it's absolutely designed around doing it with at least one other person so you don't look/feel like a weirdo hanging around in a building full of families talking to people in makeup.
I'm sure that kind of user exists, but not at this price point and not at the scale Disney would need for this to be a viable product.