Gamerzines have unearthed evidence that DICE are working on both Mirror's Edge 2 and Battlefield: Bad Company 3 at the moment. According to the information they found the developers have been working on a "crowd system" for Unreal Engine 3.0 and created leaderboards and mini-games for Mirror's Edge 2, while no specifics on Battlefield: Bad Company 3 were revealed.
Neither game is officially announced by EA, but as they say, where there's smoke there's usually a fire.