Crytek has issued an official response to the leak:
Crytek has been alerted that an early, unfinished build of Crysis 2 has appeared on Torrent sites. Crytek and EA are deeply disappointed by the news. We encourage fans to support the game and the development team by waiting and playing the final, polished game on March 22.
Crysis 2 is still in development, and the team is hard at work on it and Crysis 2 promises to be the ultimate action blockbuster as the Nanosuit lets you be the weapon as you defend NYC from an alien invasion.
Piracy continues to damage the PC development community.