These Arab clubs are spending alot in trying to develop their league and since the FFP rules are not stopping them from spending big it been easier for them to walk up to clubs across Europe and negotiate with them also using their financial capabilities to lure players with huge wage over, with the way they're going about it, I think it won't take long for their league to become very popular and almost as developed and interesting as the European competition.
 For instance the Arab Cup between Al-Nassr was really talked about on social media and  that's because it involved clubs that have a good number of European players in their squad making it  interesting, and it could be more interesting than that in the near future, I think Al-Hilal are not the only  clubs strengthening their side other clubs as well are beginning to see a need to add European players to the squad to strengthen them as well, Al-Etiffaq for instance who're currently interested in getting Georginio Wijnaldom from PSG I the deal happens he'll reunite with his former teammate at Liverpool, Jordan Henderson.