Just in case you were wondering, it's confirmed. Community Manager Bashiok has posted that patch 4.3 will be going live
tomorrow. That means (among other things) new dungeons, a new Darkmoon Faire, transmogrification, void storage, a new raid, and legendary daggers. There's an eight-hour downtime accompanying the patch starting at 1 a.m. Pacific, but we'll be in a whole new world on the other side.
Check after the break for the full announcement.
We will be performing extended maintenance tomorrow, November 29, for the release of the 4.3: Hour of Twilight patch. The realms will be unavailable from 3:00 a.m. PST until approximately 11:00 a.m. PST.
If your launcher states "World of Warcraft is up to date. Downloading data for the next update." please allow the Background Downloader to continue downloading the 4.3 data. You can ensure it continues even when not playing the game by going to the launcher Options, Downloader Preferences, and checking the box labeled "Download after exiting World of Warcraft". If your launcher only states "World of Warcraft is up to date" then you've already obtained the 4.3 pre-download data and will only need a small update before logging in.
For more information on 4.3: Hour of Twilight please visit: http://us.battle.net/wow/en/blog/3964559/
Brace yourselves for what could be some of most exciting updates to the game recently with patch 4.3. Review the official patch notes, and then dig into what's ahead: new item storage options, cross-realm raiding, cosmetic armor skinning and your chance to battle the mighty Deathwing -- from astride his back!