I'm sure it will be Barca with Lamine extraordinary performance, as for Real Madrid, They have a bunch of stars but I feel they aren't gonna coorperate and they wont be good chemistry among them.
Why do you say that at this time? Are you not sure that Ancelotti's coaching at Real Madrid is generally still able to reduce every player's ego? Because I don't think Real Madrid will be bad because there are more stars in their squad next season, although I also won't deny that Barcelona can be quite good with players like Yamal still in their squad next season. Barcelona fans are just hoping for the best for Barcelona next season because the coach is different, while Real Madrid will still be handled by a coach who is experienced enough so it is very unlikely to be worse than last season.
First of all, I will tell @Blitz23 that Real Madrid is one of the big teams with the biggest titles in the UCL and has always maintained its quality heritage which has always been able to look better than other teams (I'm not saying other teams are bad).
And I support @Republikcoin.com statement that what you said is very true because Ancelotti, since being with Madrid, has always been able to make the best contribution as a professional coach, always able to maintain cooperation between players so that it remains stable. So there won't be any problems even though there are too many professional players in Madrid line up and it would be ridiculous if Barcelona could compete with Madrid just relying on Yamal.
Realistically, in terms of players, it is very different and what Barcelona is currently experiencing is not only about Lamine Yamal but also requires good finances to be able to compete with Madrid.