All the teams in the champions league are famous and they deserve the title this season because they had a good performance so far, but I don't think any team other than Napoli is close to the champions league, they had an amazing performance so far and they have enough gap in the league to give some rest to some players they have to they won't have any stamina problem comparing to other teams.
I don't think Napoli should be considered favorites to win so soon. Of course this time they are in very good form and deserve to reach the final. It cannot be said that if luck is good, they can win the Champions League by winning the final as well. On the other hand, we will never leave Bayern Munich and Real Madrid behind. There is still a long way to go to win the Champions League. It is true that reaching the final is much easier for Napoli.
I don't think Real Madrid is in a good situation right now, they nearly lost the La Liga title to Barcelona and there is o hope for them anymore and this can have a negative effect on the team, however, they have enough time to recover. On the other hand, Bayern Munich started working with a new coach and we can't be sure how they are going to perform even in Bundesliga also he needs some time with his team. While Napoli got a more stable situation.