I'm going to share an opinion that most people don't agree with, but I believe that the next coach of the Brazilian national team (or the current one) should already cut Neymar from the squad to work on the team for the 2024 America's Cup and the 2026 World Cup
Technically, Neymar was a an awesome player, comparable to the best I've ever seen play, but off-field factors have always prevented him from having a good sequence of games and seasons
I still find it impressive how he loses his mind on the field. A player who's made a lot of money, played for the best teams in Europe, played a lot of games for Brazil, and still can't calm down on the field
For the 2026 World Cup, Brazil has the most important thing, which is excellent players, but the other factors are very prejudicial, such as the recent wait for coach Ancelloti, which has already caused a lot of discussion in Brazil
I agree with you, Neymar is now in injury pron player, with a high probability of getting injured at any time will definitely be a problem to Brazil if they are so reliant on this player not minding how this could affect their team on the long run in the world cup. Neymar is a very good play no doubts, he can be seen as an excellent player at that but Brazil should keep a better substitute in place for hi if they must go-to the world cup with him
Brazil should rather focus on getting their team fixed and getting ready for the world cup then thinking of getting Neymar to be in the squad, although it's still a long time from now maybe by then he should be fully recovered and ready to played well for the team but he's still prone regardless, so Brazil should see if possible they can do with out him and focus on developing younger talents on their team.