Ha, funny you bring this up as I just wrote a response in the post about backlot =D.
I think it's pretty clear that Pixar Place will expand to the South/East, "eating up" Backlot, Honey I Shrunk The Kids, and go to Streets of America.
Obviously Honey I Shrunk The Audience playground will becomes Bugs Life.
We all know about the Monsters Coaster that will take up the space next to Toy Story.
I purposed in the other thread that the Backlot tour is redone to be a "Backstage Tour of PIXAR" where the characters come to life. Think Universal's Tram tour in Hollywood where every few minutes you have a "Experience". The ride if VERY high capacity, and not *too* crazy expensive to run, so it makes sense to update rather than destroy.
The big question to me is what happens to LMA. I heard it's very expensive to maintain, probably more expensive than fantasmic from what I understand. While I think the show is VERY enjoyable, do you think they keep it (past a few more years)?