Barcelona has Yamal and Atletico has Alvarez. Both of these players can be competitors, although I think Yamal is overrated and Alvarez is not in the best team to shine individually. But if FIFA gets involved, everything could change. Messi was molded into what he was molded into by a strong-willed decision. If it weren’t for the officials, he would have remained one of many.
It's very hard for a single player can shine in modern football and carry a whole team on his shoulders. It's difficult to bring a team to success, titles by efforts of a single player. Yamal is talented but very young and he needs more experience to become players like Messi. It's only hope and whether Yamal can grow up to that level or not, is a future story that we can not know certainly now.
Messi is an idol of many youth players grown up in La Massia and Yamal is one of them but there will be only one Messi like we have only one Pele, Maradona, Cruff, Beckenbauer or Ibrahimovic. Yamal is a youth player who can contribute a lot for Barcelona and football in coming years.