Napoli's success last season was due to their consistency until the end of the season, and of course, Napoli's consistency cannot be separated from coach Spalletti who often rotates players so that the players have the mentality and confidence when performing. Spalletti also changed the stigma of the catenaccio of the famous game of Italian football. Spalletti tries to change the mindset of Italian football to not only defend but also attack. that's the art of football.
Of course, we hope that Napoli's success last season will not become a season sensation, even if coach Spalletti leaves. But now with a new coach, of course, this will be a challenge for him with the strategy he wants to implement. This season will be more difficult to win and the chances will likely shrink if the competitors can improve well in the late to early season. If you can return to performing consistently, it shouldn't be difficult for Napoli to defend the Scudetto title, at least finish as runners-up, and have the chance to win again.
My prediction is that it will be difficult for Napoli to defend the Scudetto next season, because of the loss of Spalletti. Rudi Garcia will need one or two seasons to reach Spalletti previous level, it's normal because everyone needs an adaptation process. In the defense sector they have lost Kim Min Jae who was released to Bayern Munchen, if Osimhen also leaves then it is likely that Napoli will not be able to finish in the Champions League zone.
If within this transfer deadline Napoli cannot retain their flagship players, then I think next season will be even more difficult for them.