The worst fate is to become a Klinsmann. He's going to get axed as Bayern manager now. It's in the cards.
On the other hand, you have Bernd Schuster, who, although under fire at the moment, did great thigns with Real Madrid. Arguably the fault of Real Madrid right now is not Schuster's but Calderon's. We don't really notice as much when the manager is of meager notoriety, like Pep Guardiola, or Unai Emery. When Quieroz is axed, no one will remember him as a coach because he was always a no one to everyone but the Manchester fans. When the manager is like Rijkaard or Koeman, the axe falls so quickly maybe because of the prior fame of the coach as player, and people remember. It's a strong signal to everyone.
Maradona will not have full control of his team, and that's going to be an issue. He's going to have more issues with staff members that are appointed for him; having to work with people he does not respect. But I hope he does really well. I like his work ethic, and as long as he can keep the bad influences away from him, he can do great things.