Napoli are fine and they are consolidating their teams well with news about new players coming to join them. The previous season was quite good and the upcoming one seems to be as challenging.
I expect Inter Milan to stay at their levels and AC Milan to advance. I am not sure about Juventus in the other hand. They weren't fine for a long period now. They made several recruitment, it is supposed to improve the team and I hope to see them as competitive as Inter and Napoli.