Last season was their third title in a row, if they win it next season, they'll create a new record and become the first team to win the EPL four times consecutively, but who is to say they can't do it, which team is going to stop City, personally i can't see any. Pep is prolly going to turn the EPL into a farmers' league.
I won't worry about Manchester City next season, because so far only they deserve a trophy regardless of the changes other teams make but still Manchester City is difficult to beat easily. When he learned that big clubs were hunting for players, Manchester City also got involved, indicating that Pep Guardiola does not want to relax just because he has won a Trable Winner. Manchester City has full support financially, plus there is no need to doubt the management of Pep Guardiola's team because as the best coach in the world, Pep Guardiola deserves this support.
There is no time to relax (that's what Pep Guardiola said) they will continue and continue to improve their performance while they can and not be caught off guard by the surprises that other clubs have prepared for next season.