Gaurdiola will be able to revenge their last season defeat by Real Madrid, because it will be impossible for that to happen. Next season is the last season of Gaurdiola in Manchester City and it is not possible for City to win the champios league next season because Real Madrid is still super hot with the addition of Mbappe the team will be fire.
Real Madrid will be very hot next season just because of Mbappe's presence, but that doesn’t mean the Champions League will be easy for them. Just like you said, next season will be the last season for Guardiola at Manchester City, so he will do everything in his power to win the Champions League for the club before leaving, and we know Manchester City also has a strong squad. So I can’t really say Real Madrid will win the Champions League next season, but I know the season will be an interesting one that everyone will enjoy.
The UEFA Champions League competition is Europe's biggest and most prestigious club competition and never in the history of the competition has a team easily won the the trophy and despite the quality of players in the Real Madrid team, I still do not expect them to easily win the competition come next season. I'm a Real Madrid fan and because of my passion for my club, I will definitely be pleased to see them retain the European title next season but I'll be deceiving myself if I expect it to come easy.
The arrival of Kylian Mbappe in the Real Madrid team have significantly improved the quality of the team and that's because of the prolificity of the France national team captain so I think Real Madrid already stands a better chance of winning against any European club come next season but despite the quality in the Real Madrid team, there's every possiblity that they can be eliminated from the competition by other clubs.