Minh Le left Valve some time after Valve acquired Counter Strike in order to pursue further game developments, culminating to this upcoming release. The game is a team based FPS that utilizes the Source engine, pitting terrorist and counter-terrorist teams in a variety of game modes including team deathmatch, hostage rescue, escort, and staged mission modes.
...Yes, we're talking about Tactical Intervention, even with how eerily familiar this all sounds.
Minh Le has shown in the trailer (seen below) that even though it is similar to Counter Strike, Tactical Intervention shows to include new features including reactive NPCs (possible potential hostages to grab), car chases, and attack dogs.
Hopefully the final game shows to be a bit more unique than anticipated because based on the play from Beta, it feels more like 85% unrefined Counter Strike and 15% Call of Duty mechanics. Hopefully Counter Duty isn't the real future of this game.
Full Trailer: