It will be difficult for a rivalry like Ronaldo and Messi to repeat itself if Mbappe still plays for PSG. Another talented player plays in the EPL, currently he is playing for Manchester City. The competition between Mbappe and Haaland will grow if Mbappe moves to the EPL or La Liga, Mbappe is very suitable for Real Madrid, especially since the club really wants his arrival.
Haaland immediately won the UCL trophy after playing for Manchester City, while Mbappe has never lifted the trophy. His age will increase as the years go by, if he doesn't immediately make the best decision for his future, he will forever regret not being able to win the UCL trophy. Even though PSG really wants the UCL trophy, there is very little chance of them being able to win it because when they face other strong teams in the UCL, PSG always loses mentally.
Mbappe really has to think about his career from now on. staying at PSG might not be right for him. and that is the reason why he has not yet made an extension contract with PSG.
Even when PSG was strengthened by Neymar and Messi, they also failed to achieve their hopes of winning the Champions League Trophy. and now Mbappe will of course find it difficult to bring PSG to the top. we can see their game declining in Ligue 1.
The biggest possibility is that Mbappe will go to Madrid, or that another club in the Premier League will get him.