highlights:
* Ice Age-esque Unova region!
* New GLs and gyms! (Poison and Water thus far)
* Dat underwater crystal tunnel!
* Ye Olde Pokémonaé are back, including Eevee, Mareep, Riolu, Tyranitar, Metagross, Absol.
* Not for the 3DS but you can clearly see that the graphics will be more epic on the 3DS!
source
I need this ASAP; I've been playing Black with my faves (Gastrodon, Cloyster, Drifblim, Emboar, Volcarona, Roserade) and it makes me happy to have old Pokémon in new Pokéland!