Not forever but Agüero is still the top scorer of the league. has 30 goals and 9 assists in 42 matches this year, there is no sign he will lose his mojo in a year or two. I agree with @OhForAGreavsie, Jesus is not as good as Kun, still he would be a starter at many big teams, so I wouldn't be surprised if he didn't want to waste time. Or maybe he just wants to put pressure on Pep/City board and this departing rumour is just an agent-trick.