Assassin Creed will be releasing new downloadable content called The Da Vinci Disappearance which will include 8 new missions and 2 new locations for single player mode. Multi player will include 2 new game modes, 1 new map, and 4 new characters.
The DLC will be available March 8th on XBL and PSN for 10$ (800 Microsoft Points). We have a trailer below from Ubisoft.
Another video of the new DLC was released today check out below