As you know Dawn of War has an expansion pack on the way, its looking quite nice as I see it. Anyway Relic decided to have a pre E3 show off of it to wet everyone's appetite.

The most obvious addition to the game is the all-new playable faction, the Imperial Guard, which, on the surface, may seem a bit mundane. However, the expansion is very much a product of player feedback--Relic has taken great care to listen to player comments and incorporate them into the new game

Interesting to note that its also a "World Cyber Games" Competing title now, well its interesting for me because I didn't know that.

Anyway read the full preview here: Gamespot Preview