I can't believe I am going to be a Debby-Downer for a moment. I saw a post over in Scuttlebutt, saying that it has a level suggestion of 20+ (??). If that is so, then I fear that there will be little to no new dialogue for the companions. Okay, mostly I am thinking about Solas.

- of course -
The thing is, most companion related stuff will have been long past. And for Solasmancers, many/most will have already been dumped.

Granted, it isn't like the
only dialogue to be had, is romance related. Not even. Buuut, as I said, so much companion content "in general" will have already come to pass. I could see a bit of banter, and a few random comments regarding the quest content, but nothing else.
I'll stop being a party-pooper now. Sorry.