Apart from a very good looking trailer, and a little slip of text, not much is known about Overstrike just yet, but it’s a 4 player co-op shooter, with Brink / TF2 -y graphics. Normally, I wouldn’t be too interested in this just yet, but since it’s developed by Insomniac, I’m inclined to love it.  Here’s the brief description:
Set in the near-future, Overstrike follows a team of four elite agents obliterating enemy strongholds using fringe-tech gadgets and lethal teamwork. The members of Overstrike 9 are comprised of an ex-mercenary, Interpol’s most wanted thief, a gifted young scientist and a decorated detective. Collectively, they are the agency’s outcasts. But a shadowy organization threatens to wipe out humankind. Thanks to each agent’s unique talents and a tendency to completely ignore protocol – Overstrike 9 is the only option left. Overstrike blends developer Insomniac Games’ flair for exotic weaponry and immersive storytelling with a touch of humor in this 4 person co-op action game.
You can watch the trailer, and keep up to date with the game on the official site.