I love your neutral idea, although I don't see how it would work outside of a Jester/Tanner role.
And I don't think bigger is better in this case. I actually considered California Adventure and Downtown Disney, but I felt like that would be too much ground to cover. If I did Disney World, I'd want to do Magic Kingdom/Epcot/Hollywood Studios/Wild Animal Kingdom. That would be too few lands, IMO, but zooming in to parts of each park would be too much. I think Disneyland is just right.
I dunno. This whole idea is so far down the priority list that I doubt it will ever get played. People want to do Nightvale, and then I've got Gravity Falls almost ready to run whenever the current crop of ideas runs dry.