Eh I am probably the only one who doesn't want to see them. I love them to bits, but i'd rather not have too much exposition on what happened to my Bhaalspawn and the old companions are dangerously close to that.
I'm of two minds about this.
On one hand, I never was crazily in love with the companions in BG2. They served their purpose, they were just likeable enough and more "interactive" than most of the companions in smiliar RPGs of the past, but I don't remember any of them with particular intense love, I was never in awe with their writing nor I care about the franchise because of them.
On the other hand, I'd be pretty damn curious to see to what degree Larian would nail (or fail badly) a "reimagining" of some of them.
I don't care about having them playable, anyway.