I believe the two senior players will still fill the madrid line-up next season.
both are still preserved. This means that Modric and Kross' opportunities to continue to gain positions in the main squad will remain.
This season, Ancelotti has not rotated too many players if he feels there are no problems with the main squad. whether it's Ancelotti's style of training or not being brave enough to experiment.
I'm sure the new and young players that Madrid's midfield has will undergo some changes. the combination of youth and experience will be perfect for the Madrid squad next season.