If you choose 5 clubs that have the chance to become champions of the Champions League, I myself would narrow it down to 2 clubs that in my opinion have a big chance of becoming champions next season, those two clubs are Real Madrid and Manchester City. Real Madrid is the most dominant club in the Champions League with 15 Champions League wins, while Manchester City is a mature and consistent club over the last few seasons, both in the Champions League and in the Premier League.
I am not dismissing Manchester City and Real Madrid, but when you dismiss other clubs just because they have a small chance, it is very unethical. Don't act like UCL is easy, I like Madrid and I also understand the quality of Manchester City, but by giving an early conclusion, it seems like you have discredited clubs like Liverpool, Arsenal, Bayern Munich and Barcelona.