I already know that it will be an easy win for Real Madrid. I believe that Real Madrid will able to go far in UCL, but Laliga is sure for them to win. Looking at the beginning of the season, and how Madrid started with their current stand on the table, it shows that they are ready to defend the league this season.
Unfortunately, Real Madrid must go through the play-off round first before they can be in the last 16, this is also not an easy thing because it will depend on the opponent they will face. In fact, I still believe that they will be able to advance further in the Champions League, because they have a very good mentality when they are in the Champions League. Not only that, in La Liga they also have a very good situation by being at the top of the standings leading by several points. That could be something that could make them comfortable and it could affect their game.

Unfortunately, Real Madrid is gonna face Bayern as their opponent in the play off stage. How unlucky they are facing a strong club from bundesliga. This is a good game to test their capabilities.
We know how good Bayern Munich is now. They very sharp in their attacking line, but have some troubles at defence. This is gonna be a rough game for sure.
It's also giving a pressure to the Real Madrid's performance in La liga as well, but i hope they can short it out.