However, for those less inclined to cuddly pandas or pocket-friendly monsters, Morhaime promised enough murderous Horde vs Alliance fun for the whole family. First, though, a certain dragon who’s also the apocalypse needs slaying, and the beginning of the end’s only a week away.
Soruce : http://www.pcgamer.com/2011/11/09/world-of-warcraft-loses-800000-more-subscribers-blizzard-looks-to-pandaria/
This was revealed in an interview of the Blizzard's CEO Mike Morhaime by PC-GAMER on 9th November, which means that patch will go live on 15th November.
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EDIT : Patch is NOT on 15th November as posted by the blue :
11/10/2011 12:37 PMPosted by ZarhymI'll tell you that patch 4.3 is not being released on November 15. People playing the game now know before a magazine. So there! :p