I think we've all already seen what's in there, so I'll just point out things where I have something to say. First of all, the item that enables the genies' form changes, the Reflecting Mirror, is only obtained once you've already found one of the genies in the Dream Radar, meaning the new forms are completely off-limits for anyone who doesn't have it, just like I expected. That Dream Radar has got to sell somehow, right?
In addition, the genies' new forms have had their abilities revealed, since no, they don't keep their old ones. Tornadus has Regenerator, Thundurus has Volt Absorb, and Landorus has Intimidate. Three solid abilities, but they're still a downgrade from the old ones. The reason why Thundurus and Landorus were so good was the presence of Prankster and Sand Force, so this new form of Thundurus may not follow its big brother in ubers.
Next, we have Kyurem's new forms' acquisition of Turboblaze and Teravolt. All I can say is, it's better than Pressure... too bad it's still stuck with that horrible, horrible typing. I'm eagerly waiting for the stat spreads, though I have a hunch it's just going to be 20 more points in Attack for Black Kyurem, and 20 more points in Special Attack for White Kyurem.
That would still be better than Keldeo's Resolution form, though. LAZIEST FORM CHANGE EVER. I've heard a few people suggest that it symbolizes the evolution of the d'Artagnan character in the Three Musketeers trilogy, but I call BS. They were just lazy.
Black City and White Forest return. Here's to hoping it's handled better this time around, in the first game you had to rush through the game to get there before it was deserted.
Finally, Sing Piplup will be BW2's first Wi-Fi distribution. Prepare for Empoleon's glorious return to OU! NOT.