Activision have announced that a version of Call of Duty: Modern Warfare 3 is coming to Nintendo Wii. This version of the game is in development at Treyarch, who most recently put out Call of Duty: Black Ops.
This means that yet another development studio is tied into the production of Call of Duty: Modern Warfare 3. A list that already included Infinity Ward, Raven Software, and Sledgehammer Games.