Edit:
Trailer!!! I saw wild Eevee!
According to new scans from CoroCoro on Serebii, Pokemon Black 2 and White 2 is set in Unova 2 years after Black/White. You play as brand new trainers, starting in a brand new city, and have a new rival, and be part of a new story.
Areas have been changed and updated. The construction on Route 4 has been finished, and there are new areas, including at least 2 new cities with new gym leaders (Water and Poison type). However, the east side of Unova has been covered by ice and presumably inaccessible.
Comparing the
map of Unova and the
map in the CoroCoro scan, it looks like the new area is south of Driftveil, and that's where you start (?)
So yeah, I'm probably getting Black2 or White2 now, since it's quite different from Black/White. I wonder how the gyms will work with the two new ones. Would we have 10 badges? or would some leaders be not available? From the map scan, it looks like Striaton, Nacrene, Icirrus, and maybe Opelucid are all under ice. Does that mean those leaders won't be in this game? Actually looking at it, Victory Road and the Pokemon League are under the ice too. Does that mean we have to befriend/calm Kyurem before we can challenge the Elite 4? Or would the Pokemon League just have moved? Some friends were joking that maybe we'll get a Fire type HM to melt a path through the ice, haha.
I also wonder how Black2 and White2 will be different from each other now, since Opelucid and White Forest/Black City look to be under ice. Would it just be the different Kyurem forms and version exclusive Pokemon?
I'm also kinda excited that it won't just be Gen V Pokemon. The Unova Pokedex has 300 Pokemon in it. No new Pokemon probably (or else either they can't be traded back to BW, or we would've known about them already from the game data). And one scan has Eevee in it, so we might be able to get Eevee before beating Elite 4?

Now looking at the
character designs. Crazy hair is crazy XD Though the girl's hair is kinda cute. The guy's hair....
yeah.... XD. The rival's outfit reminds me of Ethan/Silver. The white-haired girl is the Poison type gym leader, she's music-themed. And the professor-guy's hair makes me laugh XD
Anyway, I hope this game has more triple and rotation battles! It's weird how you barely have a chance to do triple battles in BW, when they advertized it so much before it came out, whereas in Gen III when double battles were first introduced, they were like everywhere. I want a triple battle subway so I can test out my Weather Disasters team XD
I wonder if we'll see any old characters, like Professor Juniper (will she give you your Pokemon once again? But Nuvema is now under ice, would she have moved to the new starting town?), Bianca and Cheren, or the BW player characters. Or N and Ghetsis (he was never found in BW). And since this is set 2 years after BW, do you think the elite 4 members would change? and would Alder still be champion? (even though you beat him, you should be champion XD)
So what do you think? Are you gonna get this game?
p.s. Happy Friday the 13th