Luffy Blueno's or Sabo beats him
The only connection Luffy and Akainu share that Sabo and Akainu don't is the scar
But Sabo and Akainu also have connections Akainu and Luffy don't, for example, Sabo has the Mera and Akainu has the Magu, it would be extremely fitting and poetic if the fruit that lost to Akainu before ends up beating him.
The only connection Luffy and Akainu share that Sabo and Akainu don't is the scar
But Sabo and Akainu also have connections Akainu and Luffy don't, for example, Sabo has the Mera and Akainu has the Magu, it would be extremely fitting and poetic if the fruit that lost to Akainu before ends up beating him.
Zoro had far more narrative build up to kill Kaido but still Luffy ended up doing it.
Luffy vs Akainu actually has far more narrative build up.
Just because you have this Yonko > Admiral head canon doesn't impact the story.
Luffy will nearly die in defeating Akainu in the final war and that's how its gonna go.
Oda didn't do marine ford and have Luffy witness Ace's death and give Luffy an X the size of his torso to "Blueno" Akainu, that is as terrible from story telling perspective as Zoro defeating Mihawk the same way he defeated Pica.