More of Dale, Erebor and Thranduil,
The arrows and treasure explanations
Extended song in Bag End
Extended riddles in the dark
Extended Battle of Anazzibazur (or whatever it's called) especially the Balrog...
The Dwarves being teased by the elves about their beards
Fili/Kili falling in the river chasing after the horses as in the book
A reference to Bilbo's overisized borrowed cloak in the book
More Rivendell-Bofur's song, the shards of Narsil and (you never know) perhaps a glance at Elrond's mythical libary
Bilbo and co seeing some of the ruins of Arnor along the road
A reference explaining why the eagles aren't just a taxi service
Extended White Council (hated how AUJ treated Christopher Lee)
A reference to the purse (maybe one of the dwarves could pick it up and discard it in the Troll's cave)
A reference to Thorin/Fili/Kili's musical talents (a quick shot or two of the harp in Erebor for instance)
The highly unlikely Gondolin stuff would be very interesting to see
(Also Hoping for Glorfindel, and young Estel cameos-in the background without any dialogue)
But: Less Actions sequences Less Radagast MUCH Less Azog
I too couldn't care less about the 3d but I'm looking forward to the extras-can't wait to see the behind the scenes stuff, esp. what lame reasoning Phillipa 'Tolkien Expert' Boyens and co had for some of the changes/addtions, and It will be interesting to see whether they include any documentaries on Tolkien, and/or the books genesis as one of his Childrens stories (ie 'Yeah its a short childrens book, so we made three adult films)
It would be cool to see some audtion tapes and outakes this time around (I believe PJ is saving LOTR's for the 'big box set' of the two trilogies), though just for the sake of convinience it would be nice to have the Production Blogs and trailers included as well as the new stuff.
I'm not hoping for that much am I?
PS. A free squeaky talking purse would be cool, just saying.