DHS was pretty much doomed in concept when they never got the LA-Florida migration they were banking on. The park was designed and intended to be a working movie studio (and probably to get Disney Studios and production out of high-taxed California to low-taxed Florida), so part of the attraction was going to be working sets and productions going on, with actual movies and creative types being around. Actual animation was going to be done there, real TV and movies were going to be shot there, and the theme park was going to revolve around that. People might have been able to sit in a studio audience or see a scene being filmed or whatever.
But it turned out people didn't want to move, and Floridas climate is less predictable than Southern California. They couldn't ever really turn it into Hollywood East, so the park had to change, and as a result became this kind of Frankenstein with inconsistent theming and no real vision to it.
For a while they tried to make it about MOVIES, but in truth the movies they focused on were generations old, and the affection for those old classics has been fading. I mean, how many people have actually SEEN Public Enemy? And even amount the classics, they're falling out of favor -- does anyone watch Stagecoach and not cringe a little? Even Ilsa and Rick seem a little corny and quaint now. Raiders -- which is a classic, but not considered a CLASSIC-- feels old to have a whole show and stage dedicated to it. Not to mention that with Matrix-ized CGI everywhere you look, stunts don't thrill like they used to.
So I think any changes they make to the park are an effort to keep it relevant. With another 10 years of Star Wars, I think it stays on the radar a while, and I guess Bonnie's going to star a new wave of Toy Story, and parents always Jeff something to show the very young kids. But the problem with making anything about anything that hasn't become iconic -- and becoming iconic in this low-attention-span climate is becoming more and more difficult.