Hmm something to remember. Assuming all romances are either with advisers or companions, 8 is the maximum number of possible romances that still allows for an even split along gender lines. That's assuming all women, but Leliana (who I believe they confirmed is non-romanceable) are romanceable. Now we know Cullen is romanceable so that would mean 3 male party members as options. We know that Cole IS NOT one of them, which leaves DHMG, Varric, Iron Bull, Blackwall, and Solas, pick 3. Hmm looks like the idea of Blackwall, Iron Bull, or Varric being an LI isn't so farfetched after all.
I think it'll DHMG, Solas definitely.
I don't think Blackwall will be a romance. He became a Grey Warden by choice, and really believes in their ideals - wouldn't want to let love get in the way of his duty (like my grey warden did...)
I like the idea of Iron Bull as a romance more than Varric, because Varric has his Bianca. But I also want Varric romancable for the sake of people who wanted to romance him in DA2, so they don't get teased for another full game. So I'm hoping both of them are romances. Maybe if they're both gated by race, they'll still count as a total one 1 romance for the sake of fairness, based on how many players actually could romance them.