The reason why all this happened, Brazil does not have a successor like Roberto Carlos, Ronaldinho and also several other senior players, so I don't think the Brazilian national team will return with the best performance if just rely on Neymar.
Just as time and generations come and go, history have it that Brazil does have football stars in all of them. I think that's why they're the most successful football nation. Before the names you listed above started representing the Selecao, there were greater Brazil national team players existed and after they retired from professional football, their also will continue to be star players in the Brazil national team. At the moment, I don't think Neymar has the strength and agility to that of Vinicius Jr or even Rodrygo so I find it to be out of point when you say