It seems that often when there's a large land transaction and the name of the buyer isn't immediately known, there's a rumor that it's Disney.
Alas, Disney would be building dozens of parks, resort hotels, and Disney Vacation Clubs throughout Texas, Missouri, other states, and various provinces of Canada if these rumors were true.
Perhaps, some day, Disney will actually go ahead with a third North American location -- but I would expect it to be in a more heavily populated area, such as the East Coast or Texas. I wouldn't expect it from current Disney executive management.
And I agree the the future of DVC appears to be limited to WDW on-site locations, where disney has "free land" and a genuine marketing advantage over other timeshare debelopers.