Here's the first trailer for Transformers:War for Cybertron
that helps set the mood for the game. It's all rendered footage so if you are looking for something in-game you're going to be disappointed as this looks like the work of the most excellent folks from Blur Studios.
The trailer does look really good (even though Megan Fox doesn't make an appearance) but I really want to see some in-game footage before getting too excited about the game. I do love that they are using the Gen 1 transformers look for the most part but I still wonder why giant robots bust out melee weapons when a blaster would be more useful.