No new Battlegrounds until Wrath of the Lich King
Forums-poster Nethaera from Blizzard has confirmed today that they will not be adding any new battlegrounds to the game until the expansion is released. A sad note for PvP players wanting a new experience when working for Season 3 gear.

There are no current plans to release one prior to Wrath of the Lich King. We are focusing on AV improvements for patch 2.3 and also on creating content for Wrath of the Lich King which includes a new battleground and of course the outdoor pvp zone, Lake Wintergrasp.

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