This is how the new expansion has been explained to me. As always, please take this with a grain of salt because this comes indirectly but from a VERY good source. This is the same person that gave the info about the SW Launch Pad, Gringott's. etc...
Most current buildings remain except for Indy and the bathrooms across from Star Tours (the TLM/Narnia One Man's Dream building over near TSMM goes too). The expansion is simply a re-skinning of the buildings that are already there. This plan was the same basic plan as the one that was rejected two years ago, they just added the "new planet" angle as well as the second attraction (the one where you are caught in the middle of the war).
I have marked it up to show how everything fits within the current park layout. The darker areas are current guest areas or attractions that are being shuttered.
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What they did not know, however, was if Attraction #2 was a new attraction or basically just an update to Star Tours. They felt that if it was a new attraction, the entrance would be where Jedi Training is now and it would be built out into the parking lot. Their feeling, though, is that it is just an updated Star Tours.
The Frozen Sing-a-long will most likely remain until their area opens in EPCOT, and then it goes bye-bye.
As for Toy Story, I've shown the new walking paths, as Pixar Place is going to be no more and that walking path (as well as the current entrance and M&G) will most likely be closed.
SOA, LMA and Muppets fate is currently unknown. It is believed they will be part of a Phase 2. 2017-18 for Toy Story and 2019 for SW is what they're hearing.
None of this is exactly "earth-shattering" after you see it marked up, IMO.
Marni? PhotoDave? Lee? Can anyone else corroborate?
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