If this is paralleling Luffy’s sake ceremony with Ace and Sabo, I’m not quite sure who the 3rd brother would be if there even would be a 3rd brother, maybe they died just like how it was believed Sabo did and eventually becoming true for Ace and that death maybe was the turning point for both Akainu and Dragon, both going their separate ways one becoming a Marine believing they are the true justice in the world and one joining the Freedom Fighters/creating the Revolutionary Army.
We even get a connection between Dragon and Akainu from Ohara, Akainu was a Vice Admiral at the time and led the Buster Call on the island and even decided to destroy an evacuation ship of survivors, months later we get Dragon visiting the Island and seeing the aftermath since he was a friend of Ohara/Clover and believed in what they stood for. Maybe this was also foreshadowing Akainu’s and Dragon’s polar opposite ideals or even Akainu knowing Ohara’s connection to Dragon and his hatred resulted in leaving no one alive. Another small detail was that Dragon was the captain of the freedom fighters during this time and Akainu only a Vice admiral kind of paralleling their eventual rise in the ranks.
Akainu and Dragon are also the same exact age of 55 just like Sabo and Ace were the same exact age.
Akainu and Dragon are both the leaders of their respective groups.
This would also be a secret, only Dragon, Akainu and maybe a handful of other people would know, very similar to how no one knew Luffy was Dragon’s son, No one knew Luffy was Garp’s grandson, no one knew Garp even had a grandson.
It’s not to far fetched to think Garp did the same thing with Dragon that he did with Ace and Luffy and let someone else take care of them or let them basically fend for themselves, so maybe Dragon grew up on his own and very similar to how Luffy did, possibly finding and befriending a young Sakazuki.
Oda drew Akainu when he was young and it looks like he lived a very rough life, maybe he was an orphan that didn’t even have a name, what if Akainu believed in loyalty and the brother Sake bond so intensely that he named himself after the very ceremony?
DISCLAIMER
I KNOW THE OBVIOUS ANSWER IS IT’S JUST AKAINU’S NAME AND MEANS NOTHING MORE, AND HIS OBSESSION WITH DRAGON IS JUST THE FACT THAT HE’S THE WORLD’S MOST WANTED MAN.
I just like making theories and seeing connections no matter how small they are and the fact that the Nefertari being revealed to be D. clan members blew our minds and I feel like it should have been so obvious, but it wasn’t, so what other things are out there right now in our faces that we can’t see?
*Theory by LightingGodEnel