Even after tonight I would still sign him.However there is no way he will be playing in England other than the second leg and other Champions League games against English oppposition and International fixtures.
Never say never.
He is looking to leave PSG and while Madrid seems his preferred choice, if they dont have the money he will have to choose to stick or twist.
Winning the CL might be the kind of thing that makes him change his mind about coming here. Signing Messi might as well.
People will talk about Qatar/Abu Dhabi but ultimately they can't afford to let him walk for free next year.