I also said that not only Man City some other teams like Liverpool Munich Milan PSG and Arsenal are giving a tough time to teams. But lets wait for the starting of UEFA Champions league 2024/25 season.
The next season champion league tournament will be a very tough one then this season due how so many clubs are prepare for the next coming season, apart from the Manchester city there so much teams that are are going to be tough as you mentioned them earlier expecially, a team like arsenal I'm expecting a good outcome from them. Because since there able to win the champion league this season; they want dominate the entire next coming season, and in my view arsenal can make that happen with how they improve their performance better, But nevertheless let us be wait and see what can actually happen in UEFA Champions league we can't make an early predict.
I think Arsenal are pretty inexperienced in the Champions League, they don't look confident at matches compared to domestic matches, so I don't expect them to get a grand result. The same can't be said about Manchester City, of course they will expect a huge result from such a team. This season they came away in the toughest match they could have won. And since Real Madrid went through, there was no point in watching the final, everything was obvious