Akainu alone doesn't run the marines, neither did Sengoku or Kong. It's astonishing that you're willing to act so cluelessly just to give Coby some non-existing fake hype. When you call someone or a group your future, you're essentially saying they're gonna shape it by living in it. That's what Garp meant when he called Coby the future—of course, he's the Golden Child of the next generation, but to say he's the only one that represents the entire future of the Marines is nothing short of dumb.