Well, what you wrote is bullshit. Andrea is the son of Umberto Agnelli (Gianni's brother) while John Elkann is the son of Margherita Agnelli (Gianni's daughter). I don't know exactly how the Agnelli's fortune is divided but Andrea definitely has the right to a big chunk of it. Also, if I'm not mistaken, Andrea makes a part of Exor's management. So to say that Andrea is a puppet and John can do whatever he wants with him is just false.