Although I hope Manchester City can defend their title, but this is not the best time to make an analysis of them. I really admire what Manchester City have achieved in the last 6-7 seasons, and they have completely dominated the Premier League with a number of titles.
Pep Guardiola has written gold in the history books of Manchester City which will later make him one of the most successful coaches with the team. To be honest I hope he can surpass many other clubs with Manchester City, but only if he wants to stay at Manchester City a little longer. It's always possible to see Pep Guardiola move to another team in the next few seasons, but I don't expect it soon.
Guardiola was able to get good results with City because he had enough time in this team. He could achieve big wins with Bayern, but the result will be when there is patience. Guardiola was already in the final with City, but lost to Chelsea, this time everything worked out and they won the final. If Guardiola stays with the team, then of course City will have many more opportunities to win big titles, because Guardiola is the greatest coach.