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.
I think in a similar way. Many people have already declared Real Madrid as champions again, but I'm not sure that Mbappe will fit into the team. Real have a system that works at the moment, but with Mbappe they will have to play in a different formation. I think Bellingham will go down this year, they lost Joselu, Rodrygo can't contribute like last year, it will be up to Vini Jr. again. This year Barca will be the favorite for the championship if they get Nico Williams. I also believe that Yamal will continue to improve.
Mbappe suitability in the system that Ancelotti built last season is a new concern, but I think Mbappe can adapt smoothly even if Ancelotti doesn't update his system. Mbappe will be plotted as a player in the main squad, Ancelotti will of course experiment again so he can find a formation that suits their new star. Apart from that, Ancelotti actually deserves to be grateful to Luis Enrique, because last season Luis Enrique often played Mbappe as a center forward. So with above average individual quality, Mbappe has the potential to perform according to expectations under Ancelotti command. We hope that Barcelona will succeed in getting Nico Williams, so that the competition for the top of the standings will remain interesting.