The champions league is going to begin again after the world cup,and we would see which team can come out to win it. Real Madrid did an excellent job last season winning their league and the champions league as Karim Benzema went on to be the highest goal scorer in Lalliga and also winning the Ballon d'or for the year.
It was indeed his season,but this year seems to be a different season altogether,he hasn't score enough goals as he did last season,although the season has not gotten anywhere yet,but Barcelona's Lewandowski has began to show his goal scoring abilities in the Laliga,and might move ahead of Benzema in winning the goalden boot this year.
It will start on valentines day if I am not wrong. That means it is about 2+ months away right now, the world cup will end at 18th, most nations are gone by that point, which means that many many players will relax for 2 months until UCL comes back. Of course leagues will start back but for majority of these clubs it's like taking a break and then having a training.
Bayern vs PSG for example, both Bayern and PSG are playing in a league that is far inferior compared to them, and that means we are going to end up with a few games before their game where they will just train and get into match shape, nothing more for them, not really a difficulty to beat their league opponents.