I can tell you for certain that Disney is NOT going to remove the Hollywood & Dine building. They would not have built what looks like a medieval battlement in front of it if they planned on not using it for private usage (blood drives, private party headquarters, candy storage, etc.) With DLR's storage capacity at the minimum (Emporium uses its roof for hanger storage), They will not give up such a valuable, multi-use building so easily.
Guests tend to think that buildings not being used by them are not being used at all. Erroneous thinking, this is. Almost all of the "unused" space in the DLR is either:
1) Used by the resort itself (H&D, Bay Area Buildings),
2) Used by 3rd party groups (Millionaire),
3) Or is unable to be used per fire codes (Backstage walk space, clear paths & aisles during Remember and Fantasmic!).
Not that I don't agree that the Busplanade should be cleaned up and/or relocated, and HPB expanded. ^_^ Although it would be nice to see an ORIGINAL E-Ticket in a Disney-operated theme park.