If Costa signs a new contract for Chelsea, he isn't going there.
If Wenger leaves at the end of the season, maybe Arsenal will try and make a statement and go for him, but I doubt it.
Utd will have Zlatan for another year, but after that, who knows?
City don't need him.
PSG have Cavani.
Barca won't sign him.
Real don't need him.
Bayern is a possibility, but I can's see them lashing 60m+ on him.
I can't see him wanting to go to China... In fairness to him, he doesn't really come across as money driven.
I can't see him going in the summer.