I think there's a rumour saying he already got a short-term contract to play in the CWC? Not sure if that's reliable. Whether he should retire or not really depends on what he thinks tbh. I mean, outsiders can't really feel what he feels, so if there is still an offer for his service, I think it's fine if he continues playing. I doubt a club offers him a contract without knowing that he's old, probably will play less time, demands a high salary, and so on.
Take note that any team going for the signature of cristiano Ronaldo now with his current age is not going for his signature because of the goals they are expecting him to score, no. They are going for his signature because of his brand, they knows that he can make a whole lot of money for them commercially, so they all know this that's why they are still scrambling for his signature even though he is 40 years old right now.
Though am not sure if fifa can strike the short term deal with him, for him to appears in the club world cup, but one thing I know very well is that he will renew his contract with Al Nassr either by a year or more.
You are correct but I have to be still agreed with you partially because I am feeling he is branded it's correct, but club don't need his goals it's not good he is still one of the best player even at the age of 40 while he can do things much better than many youngsters. His performance and fitness is always one of the best trademark for him in last few years his journey to Saudi Pro League was just for having some good funds and this was also important for Saudi League as well, so both achieved their targets now he is heading for new destination which is undecided until now but it's coming soon.
Most chances he is having no chances in Europe just Sporting CP while many are predicting he can jump for MLS or any Brazilian club which could be interesting but firstly need some days for any perfect prediction because he is still in Saudi Arab with no official statement.