It will be fascinating to see what he does with Silva and De Bruyne. He's been experimenting so much with formations and hasn't really had the players available. Either or both players may have a ton of adaptation to do in order to accomodate all the wingers we've been purchasing. Pep wasn't shy about bringing a Coman off the bench so it wouldn't shock me if Nolito/Sterling and Sane are there to change the match but you have to figure with the number of wide attackers we have that they're here to play.
People need to forget about Kroos in a deep role IMO. It was very well covered in Pep Confidential that Kroos struggled to play that role. One thing that I think is true of Silva, KDB, or Kroos in a forward midfielder role is that while none of these players are great defenders, the idea of Pep's system is that they shouldn't have to press all over the pitch as the positional discipline should give them a more controlled area to press in. In particular, this is a big shift for our players who have existed in free roles but the defensive effort may be forthcoming with less roaming on the pitch.
But going back to the pivot, I have no idea who Pep sees there right now. I can't imagine Fernando has the passing skills for the role. He's been better in the pre season matches at hiding less and showing for his teammates but he still does it far too much for a Pep pivot. Fernandinho might be tempting but I just don't see him as a conductor and you lose a lot of his best attributes in pressing and winning the ball. Gundogan is very creative and needs to be further forward as well....it's almost like Pep Guardiola, of all managers, is setup to play without a pivot. I know he did experiment with double pivot a bit and maybe he's going to mess with that again which might free him up to play with Silva or KDB in a CAM role.