Eidos Montreal is currently working not only on Deus Ex: Human Revolution and Thief 4 but also on a third game. Stephane D'Astous as General Manager announced that the project is based on a known brand..
With Tomb Raider and Hitman: Absolution we already have 2 well-known sequels, while brands such as Legacy of Kain or Commandos are still missing.
Legacy of Kain series was developed after the kick-off of Blood Omen by developers Crystal Dynamics, which, however, is currently busy with Tomb Raider. Yet there are currently circulating messages stating that an action-heavy vampire game is secretly being developed by the studio. Commandos is again the most popular game from Pyro Studios.