They made it to the champions league doesn't mean that it's guaranteed they would have a good experience there and besides no team would take them for granted anymore as they are fully aware of their capability and know exactly they are can do. The champions league this season is no joke and another team everyone would be looking to stop would be Madrid as it would be a complete joke to allow them win again in the champions league.
All over Europe the strength that Madrid posses has been a center of attention such that it has become something most teams especially in the champions league would want to contend and possibly denied them of the title but then one thing has been sure and that is in the fact that Madrid still have the strength they have built and any team ready to contend them is definitely not going to find it any funny, it's definitely going to be a tough game for any of these teams.
Everyone knows that Real Madrid is the king of Europe. It is very difficult for any club to match their performance, especially now that Real Madrid has a French star player who will make Real Madrid stronger than before, so I think other clubs will have even more difficulty thwarting that club's efforts to win the title again.
Even Man City and Bayern Munich will definitely have difficulty beating these main rivals, but yes, I also want to see a club that can surprise so that the competition looks exciting and can prove that a club studded with star players can still be beaten.