Garcia doesn't have the portray the likes of Brando or Pacino.

Actors such as Benicio Del Toro, Johnny Depp may have slightest chance to come close to the intense acting required to make a successful Godfather 4.

And the other thing i cant see is that, Godfather being set to the present 2009 time frame, where mobs and gangster don't have such an impact in the society. It will be unrealistic.

so they should go back to the 70s-80s