I think he's talented and you can see that he has potential when he played against Real Madrid. I don't think Kaka was like him at his age but his price tag is something like £40 - £60 Mill? Would be a risky investment for any Club. (Man City) £20 Million then + Millions after a few years, depending on how well he does.
I think someone will sign him, Chelsea most likely destination or Real Madrid but i'm sure someone will sign him before the World Cup because his value would of rocketed by time it finishes.