Real Madrid did not get Mbappe for free; his signing bonus is higher than the amount paid for 99.9% of player transfers. But the fact that Mbappe comes to Real at the right time is 100%, first of all, because Real showed that even without Mbappe they can take all the titles, but Mbappe cannot without Real. That is, this is an ideal situation when the player is maximally interested in proving himself, because if the results with Mbappe are worse (they probably cannot be better), then many will blame him for this.
Real Madrid is the best team in La Liga and everyone knows that with full clarity. Real Madrid will do extremely better next season, always ready for the fierce competition and will do everything within their reach to ensure they're hitting upon the big winnings. Kylian Mbappe is signed by Florentino Pérez and Carlo Ancelotti, he's here to do what he does best.
It is hoped that the addition of Mbappe will make Madrid stronger, so that they can defend the Champions League and La Liga trophies next season. Ancelotti is very happy with the recruitment of Mbappe, and in fact almost all managers hope to get a squad like the one Los Blancos currently has. However, it is not easy to manage a team that consists of star players in every line, often it can make the coach confused.
Mbappe has joined the right club, where Madrid can offer trophies every season, and can even make Mbappe win various individual awards. Without Mbappe, Madrid is still a team that can win trophies, I think Mbappe can adapt quickly, considering his quality is above the average of other players. Mbappe arrival is also not a threat to other players, Ancelotti just needs to maintain healthy competition between fellow players.