Even if Real Madrid can take Mbappe to the team, their condition will not improve much. Because Benzema and Hazard are enough for the Real Madrid forward, they played well throughout the entire season and were less injured. Luka Modrich can also play well throughout the entire season. Real's main weakness this season is their defense. Without the two main defenders, Varane and Ramos at Real Madrid, a much bigger void will be created in the team. It remains to be seen what action Real Madrid will take to fill this gap. However, if Atletico Madrid take Mbappe to the team, I think they will undoubtedly be ahead of Barcelona in winning the title.
Mbappe made a good decision to leave Monaco and joined PSG but if this time, he leaves PSG and participate in Real Madrid, it would be a bad and backward decision. Real Madrid squad is old in average age and their key players who brought 3 Champions League to the club, have been in downside of career.
Mbappe can feel he will be the most important player in Real Madrid but only this won't help him to win titles with the club or for his personal titles. The transfer of Varane to Manchester United only make things worse in Real Madrid.
I am not sure that the transfer of Mbappe will happen in the next transfer window, because Paris Saint-Germain, unlike for example Barcelona, has no problems with either finances or financial fair play and therefore can afford to play a risky game and not sell Mbappe now, hoping to convince the player to stay in the team and extend the contract later. I am also not sure that Real Madrid will force the situation with the purchase of a player, because although Real Madrid's financial situation is easier than that of its rivals in Barcelona, it is still not the easiest. Moreover, recently new information on Mbappe's transfer has not been received from either Real Madrid or Paris Saint-Germain.
The more seasons Mbappe stay in PSG, the more opportunities for him to win Champions League with PSG. As regards of that, Mbappe might not move out of Parc de Princes after he wins a Champions League with them. If Mbappe want to become the biggest star in La Liga after the era of Ronaldo and Messi, he might sacrifice a few seasons to join them.
Back to Real Madrid, will they be able to prepare big fund for that transfer?