A bit of digging has revealed that two Tom Clancy's EndWar teaser trailers are hidden within the viral website for the game,rev64.com.
Go to the site, let it load and slightly off center at the top you'll see a yellow box with "PASSCODE //" in front of it. Click on the box, type some nonsense into it and hit enter.
Do it correctly and you should hear some guy speaking (make sure you have your speakers on). Once he's finished his spiel, click on the yellow box again and type in "s9p1z6" and press enter. You should then hear a female voice talking about an energy crisis - essentially providing background on the game's setting.
Wait a short while.
Right, down left on the right you should eventually see two tiny flashing dots that you can click on. Click on these and you'll see the movies. One is of a jet fighter soaring through leaden skies and then releasing a bomb, while the second is shaky news cam-style footage of ground troops. Enjoy.
Tom Clancy's EndWar is an RTS for PS3 and Xbox 360 that's set on the battlefields of WWIII. Ubisoft's not revealed much to date, only promising that it's a "revolutionary war strategy game" that "will push the envelope of technology, showcasing artificial intelligence, graphics, physics and animations that were not possible prior to the launch of the new hardware systems."
April 27, 2007