Well I found it (though I'm not sure how your hints apply to it). It's the abandoned, never built resort property north of the TTC and west of the Wilderness Lodge, right on the Seven Seas Lagoon. It's also near the original proposed location of World Showcase, back when it was going to be its own park.
What could have been: A great luxury hotel on a prime location.
What might be: There's always a tomorrow.
What Disney is: Yes, this one was a bad analogy.
Okay, this one's probably pretty easy (at least by comparison). This used to be a very important building. Any more, not so much. So, what is it, where is it, and what did it used to be?