MMO Champion, Patch 3.1.2 will contain new Battle-Bots. Details are scarce and we don't know if this new "pet" will actually qualify as a true vanity pet. It seems that, unlike other pets, the Battle-Bot will have its own special items to be used with it: Blue Battle Fuel and Red Battle Fuel. These fuels appear to be related to the two new WoW-inspired flavors of Mountain Dew Game Fuel.
UPDATE: Confirmed by an admin on the Game Fuel forums:
The Pet will be free to users who register with the promotion and have a Blizzard account. You won't have to use points for it.
Sign up here to register. Unfortunately, this promotion is only open to U.S. residents at this time.
New Pet? Battle-Bot
May 15, 2009