Square Enix, more specifically Square Enix Europe, might be working on a game titled Heroes of Ruin. Since their European division filed the Heroes of Ruin trademark in Europe this is most likely tied to something on the Eidos side.
While Heroes of Ruin could be for a new IP, it sounds like a subtitle to me. I thought of the now dormant Legacy of Kain series. Ishaan came up with a better idea, the Commandos franchise. Commandos: Heroes of Ruin has a ring to it. Perhaps, Square Enix Europe is developing that game?