New era of Saudi League started when they have Ronaldo now they are trying to have few more stars which are good but if they go ahead with their strong domestic system and bring better academies instead of having big names this could be going good for them in future because they already have things which were important for them next few years are going to be important with now FIFA World Cup rights are settled so they needed to work on competitiveness of league in long run even improving quality level through their lower level work which bring more local player in streamline.
They are having enough sources which can keep them on good level but now management and strategy is more important if they are able to have things on good level than surely in next decade we will be having Saudi League on another level which will surely going to compete with European Leagues.
I think if Ronaldo retires or moves to another league, the popularity of the Saudi Arabian league will decrease. Increasing the appeal of the audience to watch the Saudi Arabian league matches because of Ronaldo, and that is a big fact that we have witnessed so far.
So while Ronaldo is around, the Saudi Arabian league administrators are trying to attract famous stars from Europe to strengthen the popularity of the Saudi Arabian league.
Ronaldo is old and maybe he will not be long before he announces his retirement from football, while he is still strong of course we will watch him on the field but when he announces his retirement then only a beautiful memory remains that he has given in every match.