From the comment Mbappe made concerning Messi's departure, it's obvious he's not happy with the club. For him to openly tell the club that he's not renewing his contract the moment it comes to an end in 2024. PSG has found themselves in a very tight corner and they would not want one of their highly talented player to leave for free and would have no other choice than to sell him this summer. I don't know if Manchester United has interest or he would even like to come English. The only way this deal can be feasible is if Sheikh Jassim successful with Manchester United takeover. His preferred destination as always been Real Madrid.