There's a
Crysis 2 article on PCGames.de recapping a German IRC chat with the website's staff about
Crysis 2 after their visit to Crytek to check out the upcoming shooter sequel and the updated version of its game engine. Taking advantage of Google Translate we can see the discussion includes word that an SDK is planned (though they aren't sure it will be delivered alongside the game), how the game is being developed for all three platforms simultaneously, their estimate that the single-player campaign will be 15-20 hours, how most of the game will be placed in New York City, NPC AI, vehicles, and more. They are also asked about multiplayer support, and say Crytek played it coy.
Update: This story has been corrected, as it originally stated this was an interview with Crytek thanks to our shortcomings in reading German. Thanks SlamDunk for setting us straight.