Ninja Theory is responsible for Heavenly Sword, Enslaved, the new Devil May Cry reboot and ... something starring a girl with blue hair in a dark urban environment. A demo reel on Ninja Theory's front page shows concepts and clips from all of these games, including that last one, which doesn't fit into any universes the developer has announced or released so far.
The clips show off a dystopian, vaguely Neapolitan cityscape, and a dank alley of dripping pipes, curving metal signage, garbage cans on fire and a cage-like people-mover that speeds by a bullet train. The girl has bright blue eyes, matching blue hair, and the world itself is tinged in blue hues See a few screengrabs below.
Ninja Theory is currently working on next-generation console titles, according to its introduction paragraph, though it recently teamed up with Chillingo to develop the mobile game Fightback.