The official B2/W2 Japanese site has been updated with loads of new info!
First, the most important information is the implementation of achievements, and there will be 200 of them! They are called “Medals”. You can decorate your Trainer Card with them once you get a few. They will be made out of simple tasks, like capture a Pokemon to possible “Complete National Dex”… Sheesh, if that’s the case it can be hard to achieve even 150 of them. Gotta get ‘em all~
Also, the second one, there will be a Wi-Fi event for a Piplup, male, level 15, holding Metronome and knowing Peck, Featherdance and Sing.
Next, a thing called “Dream Radar” (3DSWare app, not yet downloadable, must write about it someday) can be used to capture Tornadus, Thundurus or/and Landorus. You can use “Reflecting Mirror” to change their forms. Pokemon will keep their Dream World abilities (reminder, it’s Defiant for Tornadus and Thundurus and Sheer Force for Landorus). When you remove the mirror, it will revert. You can change the form of this trio if transferred from first B/W, but this time the ability would be default.
There are different Fes Missions and Join Avenue shop inventory that depend on the version you chose. Well, like Black City and White Forest, but they are still ingame. Join Avenue receives info from other players via wireless or Internet. There are also some new items, probably they won’t be able to be transferred back to B/W.
Well, there are also some more, minor news, you can check them on serebii.net, which was my source, even for the pics. In meanwhile, enjoy the epicness! :)