It is very hard to predict how next season is gonna be like due to the fact that some transaction will be done with the transfer window open come July.
I will go with Manchester City because their next target is to the UEFA Champions League which is their top priority if is not this season but definitely next season. Every season they continue to improve and with Pep on the touchline, next season will be filled with the best squad because he knows his target and with their status at the moment, every player will be trail to play for them.