This video has a lot of the same footage from the Transformers War For Cybertron Teaser Video, but includes voiceover from Peter Cullen as Optimus Prime. Its not Frank Welker as Megatron though, unclear if he’s still yet to be cast or if they’re going with another actor.
You’ll identify a lot more characters, including Bumblebee and Trypticon.

In related news, is Hasbro prepping a full line of War For Cybertron Toys? They’ve definitely made a deluxe Prime! Still no announcement where the series will go in 2010, this might be “filler” material until the next cartoon or movie is released.