It would be a good option for any professional footballer and I also hope that Ronaldo will take this opportunity when he retires. If you look at Ronaldo's way of taking care of his fitness, it is not impossible that at the age of 40 he can still play in the Saudi Arabian league because this league does not really need speed. On the other hand the option as you mentioned is also likely to occur because Sporting Lisbon is a club that has a big role in making Ronaldo's career and this is where Ronaldo's career started to become the world football star he is now.
Speculation about Ronaldo's future after his contract expires is still quite wild and before he decided to move to Saudi Arabia not many parties predicted this for various reasons. So let's wait and see what steps Ronaldo will take after his contract ends at Al-Nassr because there are still a few more seasons for him to stay or take steps to retire.
I think cristiano ronaldo will retire from saudi arabia league. Because I don't see any chance of coming to any European club with the performance of Cristiano Ronaldo. Also, the Saudi league will become very competitive within a few seasons.
Yes basically, the Saudi League and the Portuguese League at least the Portuguese League has higher pressure and yes, if we consider Ronaldo age then it seems very unlikely that Ronaldo will play at Sporting. Unless, if Ronaldo leaves Al Nassr in the next season and Ronaldo age is still 39 years old but still, at that age it is difficult for Sporting to let Ronaldo play. Because after all, playing in Al Nassr even though the competition is still fairly easy, but in fact Ronaldo still cannot make Al Nassr consistent to win. So yes, it is very unlikely that Ronaldo will return to Sporting because it seems, Ronaldo will really retire right at the age of 40 when his contract expires at Al Nassr.
I simply think that he has given the world a lot. Even at 37 years old, he absolutely carried Manchester United on his back. I don’t think there are many players who can actually say that especially in the modern era of football. I am pretty sure that if it was not for the hate of Manchester United coach towards him, and if it was also not for the rape allegations that he had to face around the World Cup, he would have finished his career better.
But I am definitely happy for what he has done in football. I was never a big fan of Ronaldo. I was always a fan of Messi. But watching what has been happening with Cristiano Ronaldo recently, I sure do think that he deserved better towards the end of his career. And probably I have become a Ronaldo fan slowly. It definitely makes me sad to watch him retire.