Just received an email from GOG.com, where they want me to buy the expansion pass or being more precise to pre-order it.
Interesting thing is the following: In the email they advertise, that one can explore Toussaint and get new gear, meet new monsters plus, and this being a nice little spark, new storys and questlines with existing characters.
So they definitly want to implement not only new characters but also the old ones, like Zoltan, Dandelion, etc. and of course this does mean TRISS
Maybe they use this as an opportunity to bring her more up to the front, to give her more, deserved screen time