After viewing the lagoon photos, I think it would be an awful idea to add it to anywhere in the resort right now. There's a reason it's a land conceived for TDS, it's intended to work in Tokyo DisneySea. It's a sea-themed small land for kids at TDS, it is simply totally unnecessary for a start. Oh and all the rousing speech stuff in there as well.
Scrooge's however, I would, after viewing the photos, be perfectly happy to see it on Main St.