Guardiola may not be planning to leave Manchester City at the moment as there is no reason for him to leave the club at the moment.
Nothing last forever in football and all successful cycle has its start and ending so Pep Guardiola knows when to leave Manchester City. He will continue to manage Manchester City and consider his player performance in next two seasons to decide he will sign a new contract with Manchester City or leave. If new players can replace current players and increase the club strength, Pep will consider to stay a few more seasons. In contrast, if things are not well, Pep will know that is right time for him to leave at successful time in the club.
Every meeting always ends in a farewell, sooner or later Guardiola will part ways with Manchester City. Guardiola task at Manchester City is not finished, he is still under contract with Manchester City which makes him have to focus on maintaining the performance of his team after achieving great success last season.
Guardiola will continue to give his best for Manchester City, this season the competition in the Champions League is a bit more difficult, the teams that failed last season have improved by bringing in several new players. Guardiola is well aware that his mission to defend the Champions League trophy is not easy, but he will try to make a breakthrough by improving the quality of his team in order to achieve successive streaks.