This is really difficult to say. If we look at the favourites we have Barcelona, Real Madrid Bayern Munich and PSG. I doubt Madrid will win 4 years in a row though.
I'm going to have to go with Barcelona. I think they have a good chance this year! They have improved a lot, the team is strong and they playing better together! They are also overdue a win! They dominated their domestic league and cup in recent years and will be looking to dominate Europe once again!!