There is no reason to think that Juventus and Napoli are only playing for the title. It is true that Juventus have performed very well in the last few matches. They have been able to solve all the problems within the party. But there is no way to underestimate the AC Milan team. Milan is now second in the table. So I would say if Napoli loses the truck and drop points in several matches, then Milan and Juventus will try to win the title. Milan's performance this season is quite good. There is no way to neglect this team.
I think that Inter and Lazio should not be discounted either. They are only one point behind Juventus and if, by some miracle, Napoli lose their lead, they too will be in the race for the title. However, while Napoli has such a huge margin of safety, this is just theoretical reasoning. It will be funny if, after the break, Napoli starts to increase the gap and not give chances to competitors, as many expect.