Yes, Napoli can continue to do well, they have acquired important players who can really make the difference, the fact of having such strong players means that Napoli can have an excellent championship, but there are teams like Milan who can really rise from the ashes this year so watch out for them.
It has what it takes to win again this year, given that it has no serious competitors.
So if you ask me, sorry if I'm being mean, the only one who can lose the Scudetto is the team itself, as a whole, and that means Napoli.
If he continues like he has done, I don't think he has any rivals this season.