Blizzard has made an announcement about the ending of the eleventh arena season here.
Players eligibility for rewards (title & mount) shall be determined in about week time. Points will be converted according to an exchange rate for silver.
For characters that feel to be eligible to receive rewards, it is advised not to transfer characters during that week or the week after.
Dragon Soul buff will decrease health of all mobs / bosses in Dragon Soul by the final 35% reaching it's total climax, as I suspected a month ago here. This will give players exactly a month to finish the game before the release of Mists of Pandaria.
The testing of Patch 5.0.4 on test realms has almost concluded.
This patch will include many features native for Mists of Pandaria, apart from the new content (monks, pandarens, raised cap to level 90). Players shall also expect a Pre-Mists of Pandaria event happening on the servers.
To see what's being added to the game with Patch 5.0.4, read my article by clicking here.