It will ultimately depend on how many believe having the treehouses will be a big plus for SSR. The treehouses were not hugely popular as Disney hotel rooms, but I suspect many who become
DVC members would be those who definitely would like having the treehouse unit -- people who are experienced guests, such as DVC members, would likely be more interested in doing Disney "secluded" sometimes. I may be wrong but I am doing my own thought processes. I do not own at SSR and have not stayed there, but if they have the treehouses that is something I definitely would consider despite not having quick and easy access to parks, stores, etc., i.e., a secluded Disney vacation sounds very interesting.