The Thunder King has been unleashed in Pandaria with the newest content update for Blizzard's World of Warcraft. The 5.2 patch was released today and includes a new raid, new world bosses, and a new hub for daily quests that players usually loathe for building rep with a new faction.
The patch weighs in at almost 2GB, but provides plenty of class changes and fixes in addition to the new Isle of Thunder, which will force both Alliance and Horde to work toward unlocking various stages of quests. The normal Throne of Thunder raid dungeon opens today, but as with previous raids, you'll have to wait a week for the heroic version. The first raid wing will also appear in Looking For Raid, with subsequent wings unlocking each wing after.
There's a lot to digest in this patch, and Blizzard has set up a hub with discussions on all the new content. But if you just want the bullets with no explanation, then you can tackle the 5.2 patch notes on your own.