Yaya is obviously first out the door, probably followed by Nasri. Demichelis is obviously leaving but for non-Pep related reasons. I would have thought that all 4 of our fullbacks are in a bit of doubt, with Zaba being the most likely to stay but none of them are young and none of them are exactly great on the ball.
Denayer will almost certainly become a big part of the squad, so will Angelino. As for signings, fuck knows but I presume a few central midfielders who can pass and press will be incoming along with some young, energetic fullbacks.