http://www.worldofwarcraft.com/info/underdev/
Next Patch:
Currently in Development:
bit more at the link
Next Patch:
New Dungeon: Dire Maul (56-60 level Dungeon in Feralas)
More information coming soon!
UI Improvements:
+ 4 new action bars totaling 48 action slots
+ Chat bubbles
+ Quest tracker
+ Group loot - rolling on a "bind on pick-up" item now brings up a confirmation dialog
Action Bars + Bubbles
Quest tracker
Class Improvements:
+ Mage - New Spell: Mage Armor allows mana regeneration to function while casting and increases resistance to all magic schools
+ Druid - Cat form damage per second increased
+ Warrior - Rage will now generate when attacks are parried, dodged and blocked
+ Priest - Power Word: Shield can now be cast on all raid members
Meeting Stones: Meeting Stones are located outside of each dungeon to help players find a group to adventure into the dungeon. The meeting stone will try to find you a viable group by finding a tank, a healer, and so on. As time goes on and you are unable to find a group, the meeting stone will become less picky about who it chooses to group you with.
Numerous Bug Fixes
Currently in Development:
Outdoor Raid Encounters:
Azuregos
(encounter in Azshara)
Lord Kazzak
(encounter in Tainted Scar)
Player vs Player Honor System: Players will have access to new armor sets and weapons by increasing rank in the PvP Honor System.
Player vs Player Battlegrounds - Graveyard, Guard Tower, and Mine Control: Factions can capture and control graveyards, guard towers, and mines in contested areas.
Player vs Player Battlegrounds: Player vs Player Battlegrounds will be added to the landscape.
New High End Content:
+ Blackwing Lair (New Raid Dungeon)
High Level Items: New dungeon/instance armor sets.
bit more at the link