Here's a trailer for Assassin's Creed: Revelations. It's got some music in it, and lots of epic shots of an assassin doing creedy things. You love it!
As well as this trailer, Ubisoft showed off some gameplay during its E3 press conference. You can aim your smoke bombs now! Outside of that, it very much looks like pure Assassin's Creed. Running, jumping, stabbing ... oh, and using a flamethrower to burn ships.