I see impossible to see Napoli being champion of the SerieA back to back, they never do something like that plus Inter needs to win something asap after losing it all in the end of the last season.
This plus this Napoli seems to be the best one and when this kind of teams are in that particular position they start to fall.
I wouldn't want to club to conclude so fast but rather give Napoli the benefit of doubt about retaining their Scudetto title, because I don't expect the other contenders to take it lightly on Napoli but rather try to stop them from finishing top of the table. Inter Milan lost out on the trophy last season whilst trying to secure a place in the UCL finals but still lost to PSG in the finals by 5 goals to nil so it is going to be an interesting season in the Serie A because Napoli all the same.