Maybe besides Haaland and Mbappe there will be some other stars in the Champions League.... For example, last season Napoli's new player Hvica Kvaratskhelia.... Maybe some other new players will appear in Real Madrid, Barcelona, PSG or even Napoli for example.... Of course Haaland and Mbappe are the best right now, but in football there are often surprises....
Yes, maybe we will see new stars in the Champions League besides Haaland and also Mbappe, because now there are many other talented young players in big Europa clubs. As another example, Bayern Munich which already has a young striker I mean Mathys Tel. Also Leipzig, right now this club is getting a new talented player, I mean Benjamin Sesko is likely to be the next star player.
Most of these stars you are talking about are young and they don't have enough experience or some of these younger talents are in the teams they can't be in the Champions League just like Harry Kane who playing for Tottenham for years and he has been a good player but his team can't achieve anything yet.
Victor Osimhen is another example who plays for Napoli and he can't have too much hope for winning the title with his team.