A Juventus supporting correspondent of mine (based in Italy) is of the belief that the following will happen:-
Players in Diego, Cannavaro, Criscito, Moretti and Pizarro for sure.
Players out Trezeguet, Tiago, Zebina Camoranesi(Ranieri), Palladino, Zalayeta, Giovinco(Ranieri) Lanzafame.
Certain returns Paolucci and Rossi.
It appears that Diego, Cannavaro and Criscito are in the bag. I think Palladino will be used to ensure Criscito comes back without a contract battle.
I'm not so sure about Moretti and Pizarro. I really suspect De Silvestri is coming, and that would be a good investment. Lazio doesn't need both Lichtsteiner and De Silvestri, and De Silvestri is one more likely to be sold, and for a better price.
However, I really doubt Camoranesi or Giovinco are going anywhere. I suspect that even if Ranieri stays (which is incredibly doubtful despite the rhetoric), he's been told to make better use of them to compliment Diego or be tossed very early.
I have the feeling that one of Trezeguet or Iaquinta are gone for sure, with the off-chance both go, in favor of a guy like Quagliarella, who is capable of playing as a right winger or striker. Plus, if Paolucci comes back, he's more likely to be content as a sub, where Trez and Iaquinta would likely lose patience in a WC year.
That way, they have the option to play with a target man (Amauri), three attacking mids (Giovinco/DP-Diego-Quag/Camo) and two defensive mids (Sissoko and one of Poulsen/Zanetti/Marchisio).
All the other departures make total sense.
So my guess is:
IN: Diego, Cannavaro, Criscito, De Silvestri, Quagliarella, Paolucci
OUT: Trezeguet and/or Iaquinta, Tiago, Zebina, Palladino, Zalayeta, Lanzafame, Knezevic, Marchionni or Salihamidzic