Hawaii would be very fun, perfect weather too. Unfortunately every other corporation is ruining the islands before Disney has a chance to.
Me? I'd like to see nothing. Not another park anywhere in the U.S. Outside of the US, I find the Asian market intriguing. But like most people, I think that many parts of WDW are a mess. I've never been to DCA, but I hear that's a mess too. No, I don't want to see anymore investments until Disney fulfills its commitment to the ones it has already made.