Zevran is with my Surana (who often disappears, but for reasons unrelated to Dread Wolfs).
I like to think Merrill has enough sense and connections with Varric to steer clear.
I have some concerns about Fenris, because on one hand I could see him emphasizing a lot with Solas, they're not too unalike. But Fenris might not be onboard bringing back a ton of magic and what amounts to super elven magisters. Then again, I remember what the Pride demon was able to tempt him with... So I'm not entirely sure with him, which worries me.
Ariane is with Finn, and I'm not worried about her.
Velanna, I could see her jump to join.