Assassin Creed: Revelations - first and second teaser (Game)

Assassin's Creed: Revelations is an upcoming video game in the Assassin's Creed franchise, in development by Ubisoft Montreal and to be published by Ubisoft. It was accidentally announced early on Friday, April 29, 2011 on Ubisoft's Facebook page. The May issue of Game Informer is expected to have the full reveal. Ubisoft will likely share more details at the E3 2011 press conference on June 6, as well.
Currently, Ubisoft's Facebook released a teaser revealing an ancient castle, the hidden blade of what look's like Altaïr, and an arabic phrase saying "Altaïr Ibn La Ahad", Altair's full name. There is also a bright light in the shape of Greece and an artifact known as the Phaistos Disc, which leads us to believe that the next game will take place in Greece or during the Ottoman Empire in 1510-1530.

text source: wikipedia.org