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For the time being there have been no stories or rumors in terms of leaving Manchester City for Pep Guardiola because next season Pep Guardiola will still train Manchester City and that is very good for Manchester City. Especially if next season Manchester City will remain strong to fight for another title in every league, because last season Manchester City had just won its first title in the Champions League so it will definitely try to get it again next season.
Pep Guardiola once stated that he is not 100% happy to stay with Manchester City if some of the team's policies will cost him as a coach. Rumors of his departure echo last season when Manchester City were stumped over financial problems, but they have died down and have not surfaced until now.
I think Pep Guardiola will still try some new challenges in different leagues including in Serie A or maybe in Ligue 1. But so far the Premier League is one of the most competitive competitions apart from La Liga and the Bundesliga, so I think Pep Guardiola will stay for the next few seasons.