Yes some will move we need some to move, not sure which ones other than Walker, but whoever stays I don’t see any other than Ake maybe Akanji starting league or CL games , the rest they will play domestic cup games and maybe if fit Stones will play some league games too.
Really we are talking KDB, Gundogan, Kovacic, and the odd one out is Bernardo who isn’t that old but has a lot of games in his legs. Maybe playing less will see him get back to a good level maybe not, suppose it depends on motivation mentally for him as much as physically he’s done it all, hard to get back to that mental strength.
My guess Walker, Phillips, Grealish ,Ederson, Nunes ,Kovacic are the ones to go, but just a guess.Wouldn’t be surprised if Gundogan and possibly KDB stay but aren’t in the CL squad.