My personal guess is that the Muppets/ Monsters area will be themed as a studio backlot, and the rest of the HPB area will simply become a Hollywood area- which would let the Imagineers flesh out all the fake facades and get rid of the warehouse style buildings. This would also make things like ToT and the Hyperion fit much better!
I think they should have the "Hollywood Studio Campus" located behind the "Hollywood Pictures Backlot." But then again, they should slowly morph the area into one Hollywood location where you have the studio campus in Hollywood where you also find the grand Hyperion Theater and the old Hollywood Tower Hotel along with the backdrop of studio warehouses all sort of symbolically representing a Hollywood- rather than a backlot.
Well, I am referring to some pictures I saw on Darkbeer's photo update, that behind the current construction walls, a sign was displayed that read, Hollywood Studios, so, it should be interesting to see what they do with it