I definitely see Akainu going for a coup. I suspect he setup Sword since he became FA and it would be more of a twist if it was setup by him rather than other top tier Marine imo.
Akainu imo is linked to Wano somehow and thus why I think why he is so afraid of the samurai isn't from a lack of knowledge of them and their own experiences of them only being Oden and Ryuuma generally but quite the opposite, because Akainu knows them very well.
If Fujitora is from Wano at least too at I wished for him to be (although that seems all the more unlikely now and over time too), this would add to it as well and thus help give Akainu and thus Marines and WG more idea of wha the samurai are like, especially currently too.
Akainu's real name Sakazuki means sake cup AFAIK and isn't it "ironic" he killed one of the sake cup brothers of Luffy? Or was it "coincidence"? What if Akainu has his own sake cup brothers who could be Fujitora (I feel Fujitora could be a brother or relative of his at least) and Kizaru also has named attacks based on Shinto treasures of all things.
This might just be all for flair by Oda ofc, maybe he had big plans for them that could still be in the works or abandoned ideas/concepts too.
Akainu has Yakuza style flowers tattoos on him, although I've suspected he could be Hawaiian/Samaon or something like that for similar reasons, Polynesian? Hence his association with volcanoes too? Thats also completely valid if he's meant to be Japaneses too ofc. The actor who Akainu is based off )(Bunta Sugawara) and also Oda's personal favourite actor is known for Yakuza films, for being a badass, fearsome Yakuza boss or something?:
https://pop-onepiece.blogspot.com/2014/12/a-tribute-to-bunta-sugawara.html
And a final bit of trivia from the article I posted much further above in this post:
In the succeeding decades Sugawara continued to work steadily in both films and television, including voice roles in Hayao Miyazaki’s 2001 Academy-Award-winning animation “Spirited Away” (2001) and Goro Miyazaki’s 2006 hit “Tales from Earthsea”. By the time of his death, the “Battle Without Honor and Humanity” series was widely recognized by Japanese critics as a post war masterpiece, while Sugawara himself had become a tough-guy national icon, similar to fellow Toei star Ken Takakura, who died on Nov.10.
Eiichirō Oda wrote some deep words toward this sad event, and he promised to continue drawing Akainu with great respect:
"Bunta Sugawara, the greatest-looking guy in the world with the best bone structure. Rest in peace. I have no words. I will draw Akainu with great respect."
Eiichirō Oda
https://pop-onepiece.blogspot.com/2014/12/a-tribute-to-bunta-sugawara.html
Something to consider heavily for those who think Oda will fuck up and downplay Akainu too.^
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