DHS has pretty much become the "non disney original IP park". If anywhere, that's where it should go. But I think Disney is going to have to knock some people off to get the licensing for those characters back.
At some point, we have to face the fact that Disney acquires stuff.. it's now a Disney IP, and just hope they give us unique and memorable experiences with it.. like star tours, or the IJ stunt spectacular, or RnRC.
In some ways it always has been. Disney didn't own Star Wars, Indiana Jones, or the Muppets when DHS opened. And half of GMR was licensed.