Even if the MU boss welcomes him, I think Ronaldo's decision to return to the Premier League at the age of 39 is quite risky. Premier League defenders are quick and strong, so it won't be easy for Ronaldo to score. Ronaldo should stay in Saudi Arabia, which is more suitable for older players like him.
Returning to MU is too risky and too big of a challenge. Ronaldo should not trade his honor. Keep a good impression on the MU fans. His ego won't like sitting on the MU bench. If Ronaldo comes back. I believe it will happen.
Even if that doesn't happen to Ronaldo when he is back in the Manchester United team, he will also not be played full time by the Manchester United coach even though the coach is from the same country as Ronaldo. Because Ronaldo is approaching 40 years old, of course there are many different things in Ronaldo himself so he will definitely be quite overwhelmed when facing defenders from the current Premier League team. But I want to see how Ronaldo's decision is even though your suggestion also seems wise for Ronaldo.
I think for now the chances of him returning to Manchester United are very small, considering his age which is currently no longer possible to compete in a competitive league like the English league, previously he had returned to Manchester United but did not get honourable treatment from Ten Hag and also management, so that's why I say if his chances of returning to the English league are currently very small due to this disappointment, Currently we must admit that Ronaldo is a player who is nearing the end of his career as a footballer, so staying in Saudi league could be a wiser choice for him to spend his career, besides that so far he has conquered 3 major leagues in the world, so indeed there is nothing else he will look for except to become the first player to make a record of scoring 1000 goals throughout his career, and the Arab league actually guarantees he can do this rather than if playing in the English league