I do hope it's still there in November when I visit. (it's all about me, right?) We didn't have time for it in March and it's been on the top of our to do list.
I hope they decide to keep it. Its understandable that the family would like the pieces back to display them in the museum. However, is it out of the realm of possibility that some Walt Disney Memorabilia could be on loan to a spot somewhere in the World? I could imagine a rotating items on display along with maybe some reproductions of important objects and the film being the centerpiece.
As far as theming, Main Street would seem to me to be the best fit. But, Disney imagineering is amazing and I'm sure they can creatively fit it in about anywhere, even Disney Springs. And I wouldn't have any problem at all with paying for admission, just like you would for most museums and attractions of that sort - as long as it was reasonable (I know, what does reasonable work out to be according to Disney). I can't imagine I'm alone in that opinion.
Actually, the more I think about it, the more placing it in Disney Springs makes some good business sense as well as theming in a way. If I recall correctly, Disney Springs is suppose to emulate a community? Well, aren't towns more than shops and restaurants? So that would work as one of this "town's" attractions. On the business side, some people might not be into shopping very much...this could be another draw to come to this area. This "town" has bowling, movies so why not a "museum" that pays homage to the namesake of the town?
Get em in, they'll probably eat somewhere and spend a little money in a store or two.
But, then, what do I know? I'm just a Disney fan that would spend extra money to see this attraction if it wasn't in a theme park and would eat a meal and shop in many stores while I was there...I'm no expert!