Real Madrid has gotten to the top of this tournament last season and they will love to take the trophy once more. I also think they were deliberate about the bringing of Mbappé who will work hard to deliver his dream club. Remember, Real Madrid is still have Ancelotti as its coach and are not ready to relinquish him anytime within the season and I don't think Ancelotti is also interested in leading the club some more times since he understood the squad and knows how well to bring trophies home. This is also a real challenge to other A-list clubs so we can measure their performances side by side.
The champions league is such that an unpredictable competition and we may not get to assume right what the final outcome of the competition will be. Real Madrid may have signed Mbappe for them to strengthen their squad but till now, some people still found that Mbappe is yet to deliver as much of what is expected from him since he joined the team. I don’t know if they will want him to lead the club only to glory but it’s a collective effort by the teammates that will make that happen. Even when Mbappe has not joined the team, I see them as a team that can still win the champions league trophy for another time. Mbappe addition to the squad will just make it a more convincing facts that they’ll finish in a good position in the competition or maybe win the competition at all cost.