For starters, there will be 9 new dunegons, six across Pandaria itself and three heroic versions of classic instances, namely Scholomance and two updated wings of the Scarlet Monastery. The new dungeons will include the Stormstout Brewery, where you work alongside Chen Stormstout himself.
There will also be three raids at launch featuring the Mogu and the Mantid races, and Raid Finder will be integrated into every raid at Mists of Pandaria's launch. World raid bosses will also be included, as Cory Stockton says "There were problems ... we've got solutions to those problems."
Stay tuned to the Raid and Dungeons panel which will be liveblogged by us.
The news is out -- we'll be playing Mists of Pandaria! Find out what's in store with an all-new talent system, peek over our shoulder at our Pandaren hands-on, and get ready to battle your companion pets against others. It's all here right at WoW Insider!