The Saudi Arabia league is not third none 10th in the world yet, but the progress their making it obvious they will be top five in four years to come except you're not observing well and following up. this big stars that's in the league already will encouraged the young stars to believe that their dream in football are real. the younger stars will be notice now globally because for the rapid changes in the league. no body should predict the Saudi Arabia league wrongly, they are making a progressive moves. first was to sign Ronaldo to bring global attention to the league, Today every players wants to consider it. and more sponsors are already in the league.
What the 
Hope you're not really serious about saying this lolEven if they are currently bringing in some European class players but that doesn't make them in that order and I'm pretty sure of my words
We know when the current state of soccer maybe even for a long time the top 5 has always been dominated by the same league clubs as the EPL, La Liga, Serie A, Bundesliga and Ligue 1. No one can argue with that.
Even if in the end their quality is seen but still it will not enter for the top 5 of the top league especially in this case it is necessary to remember that the AFC will always be below and cannot be compared with the Champions League.