So happy news SEGA just registered the website domain wwwdawnofwar3com so i think it's safe to say they are already working on a new game or have worked on for a while already.
http://www.pcgamer.com/dawn-of-war-3-domain-registered/
So between this, Warhammer Total War, Mordheim: City of the Damned, Warhammer: Eternal Crusade, Space Hulk: Deathwing and Warhammer: Vermintide it's looking pretty damn good on the warhammer front, plenty of bad games comming to but i will not list them