It would surprise me to to ever see another Disney park in any form here in the US. Why compete against yourself when you can simply add to what you already have.
If people want Disney they usually either end up at WDW or DL, packages, discounts and the sheer number of flights going to both destinations make it very easy to get on a plane and get to either location.
I have CM's friends who quite often finish work and fly out to DL for 2 days and Fly back home to Orlando to go to work the next day. Actually just a few weeks ago 2 of them hit each of the 4 parks here riding one ride at each park then they caught a plane to DL and rode 1 ride at each of the two parks there all in 1 day (talk about park hopping)