Neymar leaving PSG for another club is a possibility because teams and fans have stopped talking about him and are now focused on how to enhance their squad. That sum is too large for any anyone not to accept and join them. During his time at PSG and Barcelona, Neymar has made significant contributions. I believe he should join the Saudi team, where he will be better respected, even though his worth as a player is limited at his current level.
Neymar's contribution to the PSG is not so significant as you said. His market value dropping so hard when he was playing for PSG. that represent his performance in PSG. Arabian club can afford him from PSG but the main question is now whether neymar agree to join in the saudi pro league?
He has been linked to the al hilal after hilal was not able getting messi from PSG. Messi chooses to join intermiami rather than PSG. It sounds really weird for me to see that if arabian club offers him such a big amounts of money and he will reject it.
Neymar gonna prefer to pick barcelona over saudi club. Even it has been rumored if PSG and barcelona already reach agreement for his transfer.
https://www.forbes.com/sites/tomsanderson/2023/07/01/fc-barcelona-and-psg-reportedly-reach-agreement-on-neymar-transfer---except-for-one-vital-point/?sh=508183e744b8Im still waiting for the further confirmation from barcelona regarding this.