For now we can't say must be, because the player will eventually move to the clubs that can afford him in the current price Real Madrid indeed need player like Mbappe and at that the club is already closing in on bringing the world record breaking player, into their fold, but then we still have a lot of things to look out for before we can conclude on his moving to real Madrid and knowing what we should expect from real Madrid in this new season.
Mbappe must again adjust to the tactics of the new coach at Real Madrid next season because he must be willing to follow Alonso's instructions because that is a very different coach from Ancelotti. And for the other lines I think Real Madrid still have to make a little improvement in defense and also the wings because the midfield and wing lines and Real Madrid's defense are still not perfect to face a more challenging next season. So overall Real Madrid must be willing to see some new players in order to improve their strength next season.