I sincerely hope we don't.
It's possible, in The Witcher 2 we got to play Roche / Iorveth and Henselt / Stennis for a bit. I don't see why not, it would be nice.
Oh please NO DLCS! Just no. I meant just like in W2 but a bit longer sequences.
PS: In W2 when you get to play as Stennis just talk to some dwarfs as you go to the meeting. One of them says: Nice ponytail!
As far as I know she can use magic and fight like Witcher. Hmm maybe new set of magic spells and diffferent fighting style. That would be something!
Geez, do you really want to spoilt that for yourself?What do you think? It would be amazing!
Just imagine it...