This...this is absolutely amazing news.
The Space Marine charging straight into a Deff Dread was...just stupid (correct me if that wasn't a Deff Dread, thanks). But the Wraithknight stomping on it was great. And the Imperial Knights showing up was pure awesome.
I love Imperial Knights. IMPERIAL KNIGHTS! Imperial Knights are in Dawn of War III! I absolutely need to get this game now!
FOR THE EMPEROR!
By the way, even though the Imperial Knights are red, they don't look like they're from House Raven or House Taranis. Their House Crest is completely different. I've never seen it before, and I'm guessing it'll be an original in-game House.
Dawn of War III will most likely be a Real Time Strategy game in the vein of its predecessors, and from the looks of it, it will only have 3 factions, the Imperium, the Eldar and the Orks. I don't know if we'll have the Imperial Guard alongside the Imperial Knights and Space Marines in an all-Imperium army, but if we do that will be awesome (and cool if we have Craftworld Eldar, Dark Eldar and Harlequinns combined into the Eldar faction). We'll see. I'll wait for more news.