I think a lot depends what is going to happen to a number of other players from top clubs, first and foremost Mbappe. That definitely makes other players also change their minds if a world class player joins the team from elsewhere.
I don't know how Real Madrid is going to manage the financial fair play rules, but next year I think they want to get a decent number of world class players and then Pogba could be one of them.
Mbappe is going to demand 500k+ wages to join Real Madrid I do not think Real Madrid will be able to afford both Mbappe and Pogba. This is why I find the rumors around them signing Haaland and Mbappe stupid because they cannot afford both of them they can only afford 1 of them. Then they have to follow financial fair play and signing Mbappe might take them over that just like Barcelona there is a salary cap per team in the La Liga to and if Real Madrid want to avoid becoming like Barcelona they have to be careful how much they are paying these players that they sign. I think Mbappe might be to expensive to sign because of his wages. I think Haaland could be the better option because he will not demand as much as Mbappe.
I somewhere read the headline that financial fair play failed or is about to come to an end. That it failed is clearly true because the penalties for violating the rules don't outweigh the benefits the clubs achieve with transfers they would normally not be allowed to do.
Anyway I think that Madrid could go for a big move next season. Mbappe + Haaland would be absolutely insane, but I don't think it is impossible. Although it might not even be their plan to get two strikers of that calibre. They should rather do something for their midfield I guess.