Blizzard released more information about the upcoming battleground yesterday. More information can be found at Blizzards site via the links below.

Battlegrounds: Arathi Basin
We've just added a new Arathi Basin section for the upcoming Battleground which features new rewards pages. Arathi Basin is currently being tested by players on our Public Test Realm, and once testing is complete, it will be included in our next patch for World of Warcraft. See the Test Realm patch notes for an idea of what else players can expect with the next patch.