Only things I can comment on so far:
The title movie was nowhere near as good as Dark Crusade's, but not nearly as bad as the original Dawn of War's.
The background movie when starting the campaign was just silly. Of course, there was really no way around it, they had to explain what 9 races were doing on four planets. Well, these guys were here, these were here, these were here, and then came, and then and then and then....
Oh and also, Gorgutz has to be the official hero of the series.