Look. Before we go any further. I know. There's zero gameplay footage, there's zero announcements (because we knew the product itself was coming in 2009), and with no gameplay and a s-s-s-haky cam, there's always the chance it's a fake. But you know what? As a community service to anyone who is still a Metallica fan, here you go. This trailer is apparently bundled with Guitar Hero: World Tour, and comes complete with corny "Ride the Lightning" tag line.
[thanks everyone who sent this in!]