We can still hope that Barca and him have some kind of agreement that he can stay but keeps silent and says he only wants Barca, so that they can rinse us to another loan deal on deadline day. But they need to be the only interested option to play that way.
What be cool if City said 'no way' and he stays here to train without being registered.
If he wants to play for City again HE would have to go to Pep and apologize to not disturb our great team spirit that is key for our success, but I doubt he'd be able to do that for his low self confidence.