I don't know about the frozen part of Unova... I mean, I suppose there could be a whole tunnel system under it (if I remember right, the page in Bulbanews said that cave entrances were visible in the glaciers)...
What I'm really hoping for is that the whole game is higher leveled... What I mean is that I hope that at the end of the game you won't have to fight a Champion (actually, N or Ghetsis) who doesn't have pokes stronger than lvl. 54. That really annoyed me about BW, Champions need to have pokemon of lvl 60+ (Garchomp from DP, anyone?). The rest of the E4 and even the gym-leaders should be stronger and more challenging. The level differences between the various gym-leaders in BW were too damn small (Zebstrika lvl. 27 --- Excadrill lvl. 31, it's ridiculous).
So yeah, I'm mostly hoping for a boost in how challenging the game will be to beat. And the storyline better be good, too.
What I'm really hoping for is that the whole game is higher leveled... What I mean is that I hope that at the end of the game you won't have to fight a Champion (actually, N or Ghetsis) who doesn't have pokes stronger than lvl. 54. That really annoyed me about BW, Champions need to have pokemon of lvl 60+ (Garchomp from DP, anyone?). The rest of the E4 and even the gym-leaders should be stronger and more challenging. The level differences between the various gym-leaders in BW were too damn small (Zebstrika lvl. 27 --- Excadrill lvl. 31, it's ridiculous).
So yeah, I'm mostly hoping for a boost in how challenging the game will be to beat. And the storyline better be good, too.