So, I have a proposal for Disney.
With the economy as it is, it's unlikely Disney can even do anything cool anytime soon. As sad as that is, the silver lining is that this serves as a somewhat reasonable excuse for not doing something cool.
Because fans won't expect anything, and be fairly forgiving due to the 'economy' excuse, Disney can make not doing anything 'real' a legit strategy.
Thus, throw out a bunch of full-blown blue sky rumors. Australia, Beastly Kingdom, Star Wars land, Pixar land, new coasters, potential 5th gates. Stuff along the lines of Walt's original 'EPCOT' - never really close to reality, but interesting and ambitious enough to create buzz.
By the time the economy turns around, Disney along with its fan base will have a really solid and mature sense of what's popular as well as realistic.
And then we can spend hours looking back at that era with all the cool ideas because nobody was really anticipating anything real anyway (a la America and DisneySea).