In a move that isn't surprising nor unexpected, Activision Blizzard has announced and revealed Call of Duty: Modern Warfare 2 today in Manhattan, NY. Modern Warfare 2 is the sequel to Infinity Ward's award winning original, Modern Warfare.
According to MTV Multiplayer, Activision announced the title at a Massive Inc. upfront earlier today. Upfront events are generally thrown in order for publishers to display their titles to advertisers.
Considering the game is quite a long ways away, there hasn't been any real info or details released about the game. However, the release window for Fall 2009 is something that has been revealed.