Regarding the squad for CL, it was nicely explained on one of polish fansite. Current squad looks like this (Perrin and Pjaca not included):
Its 25 players, with out Chiellini its 24. The limit with one HG player (Pinsoglio) is 22 players so 2 of the players above wont be included for CL. The rumours were that this will be Mandzukic and Matuidi. Right now i have doubts Matuidi will not be included, because he plays.