Despite us being linked with big name signings such as Pogba or SMS, my gut feel is that before our transfer market closes the following will happen.
If Sandro wants to leave and we receive >50m bid, he will go and be replaced by either Marcelo (1st choice), Darmian or Bernat.
I think Godin comes in regardless of whether Benatia leaves. Allegri likes to have the flexibility to play a back 3 and Godin won't be a costly transfer - I.e he will want to have 5 center backs (Barzagli, Caldara, Benatia, Chiellini and Godin). He will be the replacement for Rugani.
Pjanic stays and there will be no other significant midfield additions. Should either Khedira or Marchisio leave, then expect someone like Golivin, Rabiot or Kovacic. Gomes or Rakitic are other options should Pogba go to Barca.
No changes in forwards other than Higuain off to Chelsea.
So in summary, I think Godin and Marcelo are the 2 biggest profile additions that are possible.