I doubt they will add any new races. They may finally make races like Necrons, Dark Eldar, and Tau to be playable again, since they were never playable in DoW2. I would prefer that over the others. And if they went back to the formula from the Dark Crusade/Soulstorm games, that would be great. More back to the older RTS formula with the territories and stuff would be fun, but continue with the hero, squad based formula from DoW2.