Patch 4.3 is the last of Cataclysm, Dave Kosak confirms

Dave "Fargo" Kosak, lead quest designer for World of Warcraft, recently confirmed in an interview with Videogamer.com that the recent content patch 4.3 will be the final content patch of Cataclysm. We will not be getting a Sunwell- or Halion-esque final patch before Mists of Pandaria. However, this does not discount the patches and updates that will most likely be coming to add Mists content or prepare for the next expansion's in-game launch events.