Anyway, I will repost why many believe Dragon or Sabo will fight Akainu, which is the main reason why you created this thread.
Its about powerscaling. No matter how less Oda cares about powerscaling, it will be tough to sell Akainu as EoS opponent of Luffy from powerscaling pov. Kaido is stronger than Akainu. Most of the readers believe prime Teach will even be stronger than Kaido. How could Akainu be an opponent of someone who could beat prime Teach? That's where Dragon or Sabo comes into picture.
Another important point is Akainu is not a pirate. So technically Luffy has no reason to fight Akainu. If you remember what Nico Robin said,
"
Pirates... don't usually attack the government or Marines. But there is currently a force that is attempting to directly overthrow the World Government."
At Marineford, Akainu was just doing his job. It was nothing personal and Akainu had nothing to gain from the defeat of Whitebeard. There is a reason why Weevil wants to kill Blackbeard to avenge his "father", not Akainu. Again, Dragon or Sabo, as revolutionaries, are more fitting opponents for Akainu.
One piece is a pirate manga. Its a story where Luffy fights yonkos. The pirates themselves will decide their fate. You were talking about
inheriting Ace's will. Ace never wanted to kill Akainu, his target was Blackbeard. Thats what Luffy will accomplish that Ace couldnt do, he will finish the monster named Blackbeard.
Lmfao how tf am i making that up.
So you havent? Then show me a quote from Oda, "One Piece is/was a story of Luffy overthrowing the 800 year old power the wg"