Regarding the Brazilian team, that's an interesting development and would actually be the easiest way to give players a break without risking to be accused of unfair competition. In the case of Neymar I think it is still uncertain what the situation with his ankle actually is. Although he is acting way too much on the pitch, I still think he deserves to be playing the final round. Hopefully he gets healthy.
From what I understand he is already training with the team of physical trainers from Brazil, with that his injury can be seen that it is not serious and that he will soon return to play, you can see him here in this video:
https://www.instagram.com/p/Clq8ffBrVFC/he is better, with that you can see that soon he will play again, at least that is good news for brazil that yesterday they lost against cameroes, and i confess that this was an expected result, since brazil had already passed to another phase and I wouldn't play very seriously, but they had some good players in the team