Neymar is not going to come back to Saudi Arabia. You know that, right? He has been deregistered by Al Hilal and he has already flown back to Brazil. And I don't think that he will ever again get an offer from any of the Saudi clubs, after what he did to Al Hilal. Saudis will be very cautious now. For Al Hilal, there is a need to fill the vacuum left by Neymar, although Aleksandar Mitrović has been performing exceptionally well for them. I have a feeling that the replacement will be neither Osimhen nor Salah, but some less fancied player.
This has been agreed between both sides. Al Hilal cannot arbitrarily remove Neymar from the list. Al Hilal removed him from the roster for the 2023 - 2024 season to make room for recruiting a new star to replace him. Because he took a long break from playing, the team needed 1 free spot for a foreign player (8 sites, according to Saudi Pro League regulations). Perhaps Jorge Jesus wants to bring in a left-back to replace Neymar. Not a striker like you said. Where Jorge Jesus felt insecure against two domestic players, Yasser Al-Shahrani and Saud Abdulhamid.
When Neymar takes an extended leave, will Al Hilal Club continue to pay all of this star's income? It can be seen that Neymar's future at Al Hilal is very bleak. Neymar's return sooner or later is complicated to predict.