Bookmakers estimate the teams' odds exactly this way: Napoli is the favorite, Inter is the second favorite.
Napoli - 2.63
Inter - 3.75
Juventus - 6.00
Ac Milan - 6.50
As Roma - 11.00
The other teams have significantly smaller chances. But still, the main favorite has chances significantly smaller than even 50%, something around 35%, so we can assume that the season will be exciting again and the intrigue will remain until the last rounds. I wonder if Roma can displace anyone from the top 4? Of the "other" teams, they look the most promising.
This season promises to be exciting and I say that because of how much improvements I have seen from sides like Roma and AC Milan but my support stays with Napoli, I think they have a better squad now than they had last season. If they could win the league title with the squad they had then I believe they can defend the title this season.
I think we share similar support cause as far as Conte remains the choice of Napoli they might likely win the Scudetto again. I really love Inter also they're a team that very capable of winning it but since they're more focused on winning the Champions League at some point their attention would be more on the Champions League than the Serie A.