We could see a three-way championship race between Inter, Napoli, and Juventus. Inter and Napoli were in this race last year and will be competing in the UCL this year. I'm confident they'll continue this run in the league. I wish them an enjoyable season.
If you didn't know, Juventus will also be in the Champions League as they finished 4th last season. In this sense, all teams will be on equal terms as there won't be a situation like last year when Inter played both and Napoli had an advantage because they weren't in European competitions at all. But as for the chances, I don't understand why you rate Juventus so high, the main favorites are Napoli and Inter, Juventus is closer to Milan than to this pair.
Juventus has been improving, and since Igor Tudor took over midway through last season, their performance has improved significantly, thanks to the tactics implemented by Igor Tudor. So, I think it's realistic that many people have high expectations for Juventus next season.
Competition will remain fierce, and I don't think the team's busy schedule with other competitions can be an excuse. We can see from previous seasons and other leagues that top teams have been able to win titles despite tight schedules.
Honestly, of the top Serie A teams, I only have doubts about Inter Milan next season after their change of manager. I don't think it's the right move, and it's highly likely that Inter Milan's performance will not improve next season.