You never saw the long haired, bearded and bare chested Aquaman with a hook for a hand?I think Jason Momoa as Aquaman is more of a problem than Doc Savage, just because Doc Savage doesn't have the same iconic status. I just find it interesting the way some of these casting choices go for tradition (like Superman, who is still cut from the same cloth of Christopher Reeve) and elsewhere they're making a "statement".
Reeve had to bulk up and dye his hair to become Superman.