It seems like it will just be a rumor that will not come true. Neymar used to be known as a star player with extraordinary talent. But unfortunately his current situation is not the same as before and everyone, even Barcelona fans, know how Neymar's current condition is that he can no longer be relied on. And if Neymar rejoins Barcelona, it will have a negative impact again because Barcelona has to pay the salary of a player who is often absent due to injury like Neymar.
Right, I agree with you. Currently Barcelona already has a complete player in the squad so there is no reason to bring Neymar back especially as you said, Neymar will burden the club's finances, no elite club in Europa wants to take the risk of paying high salaries but is vulnerable to injury. Neymar was very lucky because Al-Hilal did not end his contract because their first target is not the game activity but because of exposure.
As an old player I think Al-Hilal will be his last club before returning to the Brazilian League, when the contract ended at Al-Hilal Neymar was 33 years old this means that is the ideal time for retirement. The scenario can be different if Al-Hilal extends his contract until 2030.
Neymar firmly said that he will stay at Al Hilal, and he feels happy there. Meanwhile, Neymar is still worthy of playing in the top five European Leagues, but his condition which is prone to injury raises concerns for clubs interested in him. Regarding high salary, that can change in the negotiation stage between the parties, but of course only a few clubs dare to do it. If Neymar leaves Saudi, and wants to continue his career in Europe again, Serie A is more suitable for him in my opinion.
Eventually, as long as Neymar is still under contract with Al Hilal, all rumors about him cannot be believed, because the player has stated his wishes for now. What is clear at this time is that everyone is waiting for the player to make a comeback after a long absence due to an ACL injury.