Ubisoft announced today that they are working on Assassins Creed Project Legacy, a facebook game which will be a companion title to the upcoming Assassin's Creed Brotherhood.
Details on exactly how the social role-playing game will work are still scarce, although it is known playing Project Legacy will allow players to unlock content and secrets in Brotherhood and visa-versa. No word on when Project Legacy will be out other than that you should expect it "soon". Assassin's Creed Brotherhood will be coming to the Xbox 360 and PS3 November 16th.