In my opinion, this move by Saudi Arabia will not make the national team strong. We just have to look at how many countries have good football leagues but need players who are playing abroad for the national team to be strong. The Saudis are bringing in foreign players to play in the Saudi league, but in the long term it will not make this league strong, because as soon as Cristiano Ronaldo retires, everyone will stop paying attention to this league and even foreign players will not accept playing in these leagues.
I think the decision of the Government or Investors to bring many star players and legends to the SPL is the first step to attract the attention of football fans from all over the world. They have unlimited money so they can do that. Now we can see that the SPL is already known by many people. Some football lovers in my country even have a collection of shirts from Al Hilal, Al Ittihad, or Al Nasr.
But on the other hand, the arrival of many star players to the Saudi League does not immediately make Saudi Arabian players one of the football powers in the world. I remember Mancini once said that Saudi Arabia had difficulty in qualifying because most of their players were bench players because teams in the SPL preferred star players from Europe or America rather than local players. Of course this is something bad for the Saudi Arabian national team but I am sure in the long term they will become one of the best teams in the world. Maybe in the future they will become the number 1 or number 2 best team in Asia along with Japan.