There are 8 players that are most likely leaving the squad, so we need some players to backfill those I think that's where the 10 new players comment comes from (Matic, Mata, Bailly, Cavani, Lingard, Pogba, Henderson and Greenwood).
If we manage to somehow get rid of Maguire and AwB that'll be 10.
GK: DDG, Heaton?
CB: Lindelof, Varane, Maguire
RB: AwB, Dalot
LB: Shaw, Telles
DM: ???
#8: Fred, McTominay
#10: Bruno, Donny?, Hannibal?
LW: Sancho / Rashford
RW: ??
CF: Ronaldo / ??
Bolded ones I think will be fine in the starting XI next season.
Obvious key gaps are DM, RW.
Followed by a backup CF and potentially a starting CB if targets are available. Otherwise a punt on a youth option would be good enough and we go in to the next season with Varane, Maguire, Lindelof as the starters.
Getting a good RW and DM will transform this side. Hoping for a RW that's a ball carrier and a playmaking DM of the Carrick, Rodri, Busquets mould.