So, from the pages of D23, I grabbed my magnifying glasses and tried to figure out what some of the concept art was actually depicting in that giant picture of the Imagineering office.
REMEMBER, this could all change. My eyes aren't foolproof, either.
First up looks like the Pirate League, a Bippity-Boppity Boutique for the boys. Looks like it's going into Adventureland like the one at WDW.
Next is a Jungle Cruise refurb. It looks like the piranhas are coming over for a visit, and there seems to be a cave being pictured.
Then is the Pixie Hollow Meet 'n' Greet, and it looks like you guys are testing out the giant tree that WDW might be getting for their expansion.
Okay, so the next one is weird. There's two pictures side-by-side, and they look like two concepts of the same thing. One side looks like a giant tree, and it looks like it's labeled "Lion King Treehouse". However, next to it is another concept of the same tree-thing, but it looks like it's labeled "Lion King Ferris Wheel". Really? This is looking weird.
Though I'm not sure what the next picture is exactly, it says "Up" on it's placecard, and there's a pic of Dug the dog and you can even make out the interior of the blimp from the movie
Next is pretty cool: Tiki Room Holiday. Looks like the fountain is covered in snow!
It looks like a Country Bear Jamboree refurb is in the cards.
Okay, so the next one shows the Hitchhiking Ghosts, and the placecard says "Haunted Mansion"... something. I can't make it out, but I bet it's another refurb.
There's a VERY interesting storyboard next, and it consists of MANY different little pictures (in full color) mounted on what looks to be a book's pages. Next to it is 9 different black-and-white scenes. Under it is... guess what? The ballroom for the Cinderella Castle walkthrough! So it looks like this walkthrough is going to be major after all, and it looks like it has a LOT of scenes, at least 9. Looks just as detailed (or more detailed) as the Mystery Tour.
The final visible chunk of pictures looks like a refurb of Tomorrowland. There's a major WALL-E section, and it looks like EVE and WALL-E are soaring over the heads of guests. Wether they're 3-D or AA, I have no clue. The Stitch Live thing has made an appearance, and for whatever reason I can make out the Lightning McQueen and Mater from Cars in the middle of it all. New Autopia? Yes, there is a TRON LIGHT CYCLE pictured...
The final one looks like the centerpiece of the Tomorrowland Refurb. There's a ship blasting off, reminiscent of the Mission:Space concept art (or is it a jet pack?), and there's a few more pictures of an alien landscape (maybe the moon?) with human structures on the surface.
There's also a giant foldout of DisneySea on the wall just behind the concept art...