5TH Cell has finally announced the new game they're working on after quite a bit of teasing. The game is called Hybrid and it's being developed exclusively for Xbox Live Arcade.
5TH Cell are known for their innovative drawing games, like Drawn to Life and Scribblenauts, but Hybrid is going to be a third person shooter that they hope will be ground-breaking.
Very little is known about the game so far, but it's planned for a Summer 2011 launch.
Source: What Is Hybrid