I have checked Transfermarkt for further information about Neymar's current condition. It says that his return date is still unknown. Even though people are staying positive about his return soon I'm not that much sure for now. Missing the rest of the group matches will be bad for him of course. But hopefully he can catch up with the matches in the later stages.
As for the team they can find a solution to this actually. Because Brazil's most effective line is attacking obviously. There are so many talented wingers in the squad already. For example, Antony can fill his place as a player who can play on both wings.
Losing Neymar like this is certainly very detrimental, especially since he is one of the key players. When Neymar carries the ball, he is always tackled by opposing players, I am so concerned to see Neymar as if he is always being tortured when playing. Antony is actually quite good for that position, but considering his flying hours in the World Cup is still minimal, the coach might think twice about placing his position in Neymar's place. I hope that Neymar can play again as soon as possible and can be a manager of the attack line again.