Assassin's Creed 3's latest trailer is not really a trailer for the game itself, but more of a trailer for the latest version of the Anvil engine called Anvil Next. Assassin's Creed 3 and Assassin's Creed 3: Revelation are the first games to make us of the game engine. Have a look.
I lost interest after Assassin's Creed 2 since Brotherhood and Revelations were not really bringing anything new to the table. The third game on the other hand is a different story. Wandering through the forest Assassin's Creed style is already a huge plus for me. Plus, they say that this game will finally conclude the story of Desmond Miles, so I'm curious to how that plays out.
Assassin's Creed 3 will be out on October 30 for Playstation 3, Xbox 360, and PC.