Patch 5.0.4 is the patch that will add all of the new Mists of Pandaria talent trees and other class changes as well as the pre-launch events in Theramore. It will be deployed in two weeks, on August 28th.
Raid Lockouts to be Reset Aug 28th
Kaivax: Please be aware that with the release of the pre-expansion 5.0.4 patch on Tuesday, August 28, all raid lockouts will be reset. This means that you will not be able to extend a raid lockout beyond the week before the patch release. [link]
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PvP Season 11 Ending Aug 28th
Blizzard Entertainment: Arena and Rated Battleground Season 11 is scheduled to end on Tuesday, August 28. At that point, we will determine who is eligible for the end-of-season rewards, a process that should take approximately one week. It’s very important for players who feel that they may be eligible for Arena titles and/or the Cataclysmic Gladiator’s Twilight Drake to refrain from transferring their characters to another realm or faction until after Season 11 ends. The awarding of Season 11 titles and mounts will occur approximately 1 week after the season ends.
At the end of the season, Conquest Points will be converted to Honor Points, possibly exceeding the 4,000 point Honor cap. There will be no cap on Honor until Mists of Pandaria is released on September 25. At that time, any Honor accrued above the 4,000-point cap will be converted into gold at a rate of 35 silver per point.
All Season 11 items will cost Honor Points (equivalent to their previous Conquest Point cost) when the season ends, with the exception of any items with rating requirements attached. These items will no longer be available for purchase.
The next Arena and Rated Battleground season will begin for level-90 players approximately one week after Mists of Pandaria launches. During the break between seasons, all Rated Battleground and Arena matches will be unavailable. Matchmaking (MMR), Team, and Personal Ratings will all be wiped when Season 12 begins. [link]