It is not worse news from Neymar for Al Hilal because he will be older and more sensitive with injuries. He will be like Bale after his 30s and Neymar is very unprofessional with his lifestyle which can make his body more sensitive with injuries.
The transfer to Saudi Arabia where is abundant of entertainment services will give Neymar more chances to enjoy his life. In return he will less focus on football and more injuries, less appearances, worse performance will come with time. Ah Hilal did not sign a long contract with Neymar and perhaps they will wait the first contract expires before considering to sign a new one with Neymar.
Injury is a normal thing that happens to every player regardless of their activities outside the game, but we know that in every player transfer there will be a medical test if the player is a big risk then the club will not sign him like what happened to Hakim Ziyech so if we compare Neymar and Ziyech, Neymar still deserves to continue the contract besides the injury is not too risky so it is expected he can play in the near week. It would be better to wait for him to be really ready than forcing himself to play but in an unprepared condition especially the fans have been waiting for the action in the first match of course they don't want to see a bad impression in that first match.
By the way, did anyone watch the welcome of Neymar and the other players last Saturday? I watched it on YouTube I must say it was one of the most memorable welcomes, I know they want to emulate what Al Nassr did when they welcomed Ronaldo and it's really awesome. To this day I see the local news continues to publish news about this it even made headlines in sports news. The most important thing is that the competition between players must be more interesting than this welcoming event however the expectations of Al Hilal fans are so high on Neymar.