This image comes straight from the latest Coro Coro. It reveals that Tornadus, Thundurus & Landorus are getting new forms in Black/White 2. I'm sure more info is going to pour in from this issue soon!
PSA: This might be a good time to remind everyone that you can filter stories here on the site, especially if you are hoping to avoid spoilers of a Hyrulian nature. This is available only to registered members.
Edit Profile > Custom Filters > Games Type "breath" or other keyword to find a game, and make sure it says "Exclude".
Bam. Media blackout on that until you tell us otherwise.