Nah, I believe that it will be the Pandarens, even though people are considering them to be a Horde race, look at the Blood Elves, no one would have thought of them as Horde. Let us not forget that China has now been given WoW and since Pandas are considered a Chinese animal, well you get the idea. Beisdes we need an animal race on the Alliance side, Tauren just aren't what they use to be =/
Found this on a fansite and Blizzard has yet to comment about this picture to Gamespot since Gamespot has also found this image. Before I start getting negative feedbacks from people saying this is FAKE, I do believe the same thing, but I thought I would give the forum something to talk about =)