You’d hope 1 or 2 of Quansah, Elliott and Bradley have a chance of still being at club in 5 years time. Selecting any of the other young players (Bajcetic, Clark, Danns, Doak etc) to be here in 5 years would be a massive punt of a guess. The likelihood at this point is that if 1 of them is here in 5 years then it’ll be a result.
From 2019/20, there about 11 players who are still part of the squad currently (including 3 GKs). That feels like the absolute maximum you’d expect to see over a 5 year period. City and Arsenal have about 7 or 8 players from 2019/20 still in their current squads - though a number of those players aren’t key players (e.g. Elneny).
I think the smart choices would be Trent, MacAllister, Elliott, Jones and Bradley/Quansah but I’ve have literally no confidence in that prediction.