No Chance? Not so sure,
Any chance United had of signing him went out the window when Ferguson retired. I feel sure the question would have been asked face to face by Ronaldo, after all they have/had a "father son" relationship.
Really cannot see CURRENT OR PREVIOUS UNITED Big Ego players taking shit off of Moyes, we are already seeing it with Rooney, having had previous, and Rooney has Ronaldo's ear also.
Can see Moyes falling out with all the Old Guard, as soon as they are dropped or questioned. Could be Wilf McGuinness all over again, except Moyes will get two years, which is quite funny really.
Mourinho has fallen out with Ronaldo, and Chelsea and Arsenal, probably need Rooney more than Ronaldo anyway.
Arsenal, Tottenham, Liverpool can't afford him. Italy is out of the question, and Barca have signed heir apparent in Neymar.
That leaves us, Monaco and Paris St. Germain.
One big factor he loves the Prem and the Prem NEEDS him, no, i can't really see him giving a shit about his previous "club" anymore, he will go to the highest bidder.
Prem for the next three years and one Champions League IF we bought him.