In the Saudi league alone he has no control to play the match let alone return to Europe and it feels very impossible. The most realistic thing for him is to retire after making a lot of money here, even if he returns to Brazil no one can pay his salary and besides that it will only add problems for the team he is defending and I don't think that's good.
Since Neymar injury and since he was still with PSG, I think it's time for Neymar to stop forcing himself to continue playing football just for the money. It doesn't mean that I'm belittling Neymar but he is no longer productive because the injury he suffered made it very rare for him to appear on the field. On the one hand, considering his almost old age and unstable physical condition, he should have thought longer than forcing himself to continue being a football player but making the team that recruited him disappointed on the one hand endangering himself. Maybe my speculation is that after this season ends, Al Hilal might have a plan to terminate the contract rather than having to waste too much money.