I think it is only a rumor, Man City won't let Julian Alvarez moves to any club. Julian Alvarez is an important part of Man City, he already contributed many goals so far. I think Real Madrid will try more to sign a player like Osimhen or Harry Kane. These players deserve to be the successor of Benzema, they also have a better chance to move because their contract expires in 1-2 years. While Julian Alvarez's contract expires in 2028, there are too many years left. So, the best successor for the number 9 of Real Madrid striker should be Osimhen or Harry Kane. Haaland won't move anywhere, he is happy in Man City.