It will be a matter of time, any team that loses balance will suffer losses because their position must be shifted by other teams, including Napoli who are now 8 points ahead of AC Milan, 10 points from Jiventus and 11 points from Inter Milan and Lazio. We'll see that at least once the World Cup and League get back underway. We'll see which team makes themselves better during this World Cup break.
And you also have to see how many players from each team you mentioned were already in and playing for the world cup, because from that you can know exactly which team will still be good after the world cup. The fatigue of the core players and star players owned by each team became an obstacle in showing the best performance the team had ever shown before the world cup rolled around.