I have a bold prediction that Napoli next season won't even be in Top 4. I expect them to lose a lot of points in begining of the season. Everyone will play with more fire against them since they are champions and with possible departures of key players I see that happening.
I'm not a fan of Napoli as I read that their coach manager resigned and also some of their players were sold to other clubs and out of contract, but I can't predict the future because we don't know in the future Napoli will buy other great players or not. next season, juventus, their competitor, was hampered because of a case that made them play inconsistently so that they fell to 7th place.
I am also sure that the completion of the case facing Juventus will make them pay for their failures this season so that next season they may also have new players to make Juventus rise from adversity.
Because Napoli have been able to consistently compete in the top four in previous seasons, so next season I personally will remain confident that Napoli will still be a team competing in the top four. Although indeed, it seems certain that in the next season Napoli will have a new coach and also, with key players who will leave the club, but I believe this will not make Napoli so weak that it cannot compete in the top four.