@Fire Fist:
Considering that Akainu is now Fleet Admiral, it's doubtful he's going to let Coby advance very far due to the fact that he's pretty high up on Akainu's shit list for openly mocking the war and buying time for Shanks and crew to arrive.
Actually I think Coby is so low in rank at the moment that this doesn't even concern Akainu. The guy has his hands full with a new world order due to Blackbeard, powerful supernovers sprouting left and right and an evil organisation infiltrating their own ranks. There is no time to deal with a worm like Coby.
On top of that, Garp still trains the Marines, and I doubt Akainu would dare to lay a hand on one of Garp's students (it is even questionable if Akainu knew who Coby was and who his superior officer is when he tried to kill him during the war).
I also like how Oda keeps pushing Garp's reputation even further now that we are in the New World. I mean, let's look what Luffy did:
- He completely annihilated Enies Lobby, one of the 3 great WG branches.
- He rang the Oxbell and officially declared war on the government, twice.
- He is the son of the most wanted man in the world, most freaking wanted. Means Dragon's bounty is the absolute highest, surpassing even the Yonkou.
However, despite all of this, who is Big Mum thinking of when she hears the name Monkey D.?
!
All that said, Coby will do just fine under Garp's wing, even with Akainu in charge. However, I really don't see him becoming an Admiral, that would be pushing it. I predict that he will be around Rear Admiral when the series ends, with Smoker being the New Fleet Admiral.
! BUT BUT BUT, HE NEEDS TO BE ADMIRAL BECAUSE IT IS HIS DREAM BRAH
Yes, but I can perfectly see some sort of "where are they now" by the end of the series, only showing the future. Or a simple "2 years later" chapter, showing what the SH's are up to, as well as every other character of importance.