Napoli and Inter Milan have certainly invested heavily, so it's no surprise that these two clubs could finish in first and second place at the end of the season. However, given that the season is still early, there could be unexpected surprises.
Although Napoli and Inter Milan have done a great job for their teams to make sure the teams are well-standardized so that they can come to perform well against any of their opponents, that doesn’t give you hope right now that those two could finish up in the first or second place at the end of the season. I think it’s too early to predict that. Because the season just started, and not only Napoli and Inter are invested heavily.
Some of the other teams also did the same thing since a lot of teams failed last season. That’s why they’re trying to make this season their best. We all know what football is all about—surprise—but we should also know that the football is entirely unpredictable. Nobody knows yet who can be the right team to win the Serie A title.
Bro Napoli and inter Milan spending much in the transfer market means nothing, yes they have spent and sign good players but non of them are toping the league, so you never can tell, like you might be surprise that unexpected team from that league will win the trophy, and don't forget Juventus is out for business this time around so don't be so quick in conclusion as the league is still fresh.