Apart from Real Madrid, I will be eyeing Bayern Munich on one hand. We already know Manchester City quality so I'm seeing them at the same level with Real Madrid. However Bayern Munich is going to have a new manager. They have such a strong squad but they have had a manager problem recently. If Kompany turns out to be a good choice then they should also be considered one of top contenders for the title. 
What a pity that Kane still couldn't achieve a trophy!
He is doing the best he can individually but he needs team achievements at the same time. I think there will be a start next season finally with a domestic or international achievement.
Real Madrid without doubt will be the favorite team to win the UEFA Champions League title come next season not because they won it this season but because they've added more quality players to the squad. The club recently announced the signing of France international Kylian Mbappe who's arguably the best striker in the world at the moment and with the presence of Kylian Mbappe in the team coupled with the already intimidating squad of the club, it'll be very difficult for any other club to face Real Madrid next season. What a pity that Kane still couldn't achieve a trophy!
He is doing the best he can individually but he needs team achievements at the same time. I think there will be a start next season finally with a domestic or international achievement.That being said, there are other few clubs that might stop Real Madrid from defending the UEFA Champions League title come next season such as Manchester City and Bayern Munich. These two clubs in my opinion will be more improved than they were in the just concluded season. We're surely gonna experience a very interesting campaign in the competition come next season and I can't wait for the commensement