Arma 2

The Next Generation PC game is Bohemia Interactive Studio's "next" project after Armed Assault. There's very little information released up to this point. This game was originally to be called Operation Flashpoint 2, but the rights to the trade mark Operation FlashPoint belong to Codemasters. This Next Generation game is also sometimes refered to as Game 2 and there's no official name announced for it yet.

More detailed information can be found at the Wikipedia