Inter Milan is not a bad team anyways and they can't be forgotten for being one of the best teams in the league but winning their first game should not be used to justify how good they have become they are not the only team that recorded victory in their first game Napoli, Como and the other teams also won but until the teams face other good opponents that is when we can applaud them for winning. Napoli and Inter Milan are the strongest opponents in the league they will be the teams to look at for this season when the season gets very interesting until then let's not hype any team.
Personally I would consider Inter milan as the strongest squad in Serie a. Napoli's squad is not weak. However, their attack is still quite weak. Last season we saw inconsistent performances from napoli's attacking players. And this season too, the team has not bought any experienced strikers. However, it is certain that Napoli and Inter Milan will fight for the title. Teams like Juventus and Roma do not seem to be able to perform well consistently. On the other hand , AC milan lost their first match. Expectations cannot be high from this team either.