Look at Skyrim's (sequel to Oblivion) marketing, even now. It's not out until October but I'm already frothing at the mouth for it because of the amazing trailers, music and info over at Game Informer.
Now that is a trailer. Jeremy Soule has done the music for every ES game since Morrowind, and Birds of Prey as well. Hopefully Ubi will get him in to do the music for CoD. They even did a little translation puzzle of the language they are singing in on the trailer.
