He will probably end up staying until 2021, but who knows. Tyc Sports have been fairly bang on with everything so far and they report he's 90% going to stay until 2021. If that's the case, we will just move on and acquire the targets we were supposed to get- Koulibaly, Aouar and a left back. We are in a win win situation.
Either way, we cannot lose. If he doesn't sign for us, we've rattled Barcelona/their president, we've been the talk of the town and it's been very enjoyable reading Messi to Man City reports every day. If we do get him happy days - best player in the world, media attention and commercial growth!
For Messi to leave Barcelona now it would take going to Fifa/Courts. I'm not sure he will. Or we'd have to negotiate a fee with Barcelona- and again I'm not sure they're willing to talk on that front.
However, what we 100% do know is that Lionel Messi wants to leave Barcelona this season. Getting him out of the club is a much harder task, and it sounds like all 3 parties don't want to go to court about this.