Every club is preparing to perform well next season and not only the clubs which you mentioned, dont be surprise if you see clubs that didn't perform well last season performing well next season, from the way things are going, no club should be underestimated. But i still have confidence that Manchester city is going to perform well next season, pep Guardiola is a experienced coach and he is doing everything possible to keep Manchester city in line.
I dont really know how Chelsea's performance will be next season, getting a new coach and players, it wont really be easy for them, so currently i cant predict how their performance will be, but lets just hope they perform better next season.
In the Premier League it will be even more competitive, I believe other teams will compete strictly including the several teams mentioned, Liverpool will also not make any more mistakes like in the previous season.
Too much optimism on Manchester City, I know it's the favorite team but I think other teams will definitely match their game and even beat it.
A normal first season will be more difficult because Pochettino has to understand the old style of play, but Pochettino always has tactics and that is his plan to turn Chelsea top of the table again in the coming season.
I think this is the season in which the other teams are going to be strong together to actually beat Manchester City to the English Premier League title. At the same time, Manchester City might also actually be interested to win in the Champions League instead of the Premier League competition. I think if they find it really hard in the English Premier League, they might actually concentrate on the Champions League. The next season of the Premier League is certainly going to be hard.
Liverpool is getting dirty who is determined to bring better results and make up for the mistake of last season.
Arsenal is obviously improving and also as the runners-up, will try to win the English Premier League.
Manchester United is also improving quite well.
Let's see if Chelsea and Tottenham game also compete at the highest level as well.