Found this just a bit ago:
"AL: What is the pipeline for the future of Dawn of War III in terms of DLC?
PB: There will definitely be balance support. In the past, we’ve released whole new armies as parts of huge expansions. We haven’t fully committed to which direction we are going to go, but that’s what I think we are going to do.
We would like to expand the number of classes, but our current thinking is that we don’t want people to pay for new heroes. We would rather release them into the wild and they can use them in game. We have a “Skulls” currency that is earned just by playing the game so there will be things that can be unlocked that way. We would also like to roll out some cosmetics as well that players could purchase if they want."
Just want to say: Thank you, Relic and Sega for not tying new commanders to purchases. This is healthy and good for a competitive game. I understand the need for income to continue support and satisfy business interests. And I support cosmetics being sold for that reason. I can rest easy now, knowing I'm not going to have to pay for the other half of the Space Marine faction so I can compete with them. Will be pre-ordering soon.