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.
Brazil has always had talent in the country but it's their poor professionalism that have made the current squad in the Brazilian team not to be as good as the old players. The recent players are just dancing on the field and not playing great football. There wasn't also some old players to train the new players on how to play better as a team to win games. Too many individual talents are in the squad without them playing together as a team. Neymar was one of the problem as he holds the ball too much and doesn't give out pass when necessary, the players should play less of Brazilian football that has to do with humiliating their opponents and play more progressive football.
They should not rely on Neymar alone when it comes to performance inside the field. They should indeed work together and work on their flaws. Otherwise, they won't achieve harmonious relationship inside the arena. Knowing their respective strengths and weaknesses will also be an advantage as they can work around about such imperfections and turn it into positive aspect of their team.