In as much as Bayern Munich, Man City and Real Madrid are the favourites to win the champions league, we should not also forget that an unexpected club that nobody imagined from anywhere could come up and take the day, this is the champions Leagues, though we have our favourite but anything can happen, this is the game of football. I would really want an under dog club to take people by suprise this champions league season.
Without a doubt an underdog winning the UCL could be quite exciting, but this is an unlikely occurrence as the top clubs can buy any player for any price and improve their performance based on their economic power, however such a team will need to improve based on the chemistry of their players and keep beating the odds over and over again, and this is a very difficult task to achieve taking into consideration the current conditions of soccer all over the world.
Before any club qualifies to the champions League, it is believed that that club has performed extremely well in its previous season in their domestic League, that is why it is being referred to as the League of champions, no doubt about the fact that there are clubs that have extra ordinary brilliance like the ones we've listed, but for any club that is there in the champions League already is a champion in its own right, so any of the champions that is not among the favourites champions can take the day.