There is something fans need to understand about Oda's writing style. Oda likes to often take secondary characters, put them on the back burner for some time, and then surprise the readers with how strong said character has grown.
Robin is the perfect example of this. The last time she had a serious 1v1 was skypiea, and now you have her beating black maria, all while showing off new techniques like gigante fleur, demonio, and fishman karate.
Oda also held off from showing Zoro's true power for quite some time, we are 1000+ chapters into the series and Zoro just recently used asura for the first time post skip.
My point with this is that since the series is so long and not every character gets a spotlight every arc, when a character does have the opportunity to shine, when they are given a spotlight, Oda isn't going to disappoint the reader.
So lets take Koby and view him under this lens. Koby is a very important character, his dream parallels Luffy's and he played a pivotal role in marineford. Koby also didn't make an official appearance post skip until after WCI and not only is his mission at amazon lily the first major thing he's doing post skip, its basically the only major thing he's done apart from marineford.
With this in mind, does it make sense for Oda to set Koby up for failure? For him to not show Koby hundreds of chapters and then send him into a battle where he gets low diffed? The same guy who is supposed to be a future admiral? It just doesn't make sense. Luffy is fighting the yonko, Zoro and sanji are fighting the yonko commanders, and the rest fought the tobi roppo. Are we really supposed to believe that after 2 years of haki training from garp, Oda can't power him up enough to win at least one battle in the new world?
Personally, I think Oda has already given enough set up for Koby to win. We know that the marines have extremely high tech weapons, we know vegapunk and the SSG were supposed to replace the shichibukai, why can't Koby get a science upgrade? Maybe he could get an artificial devil fruit, or a sea stone weapon, or a raid suit, genetic enhancements, cybernetic enhancements steroids, literally anything.
Koby has no feats and his portrayal isn't necessarily bad, if Oda reveals that the SSG gave him an upgrade, he could easily create a scenario where Koby gets the W and I just don't know why he wouldn't do that given how Koby hasn't got a spotlight in 400+ chapters.
Apart from what I've already addressed, there's one other argument I feel like dominates this discussion when it really shouldn't.
"Koby is just a captain, he's clearly too weak to fight hancock"
To that I respond that Zoro technically has a bounty that's only 20 mil higher than pekoms and he scarred kaido. Koby is just a captain until he's not; we're headed towards the end of the series post wano, by the final war Koby should at least be a vice admiral. Whenever Oda holds off on revealing a character's true strength, there are inevitably fans who will doubt that Oda will surprise them. Many fans said that zoro would never fight kaido, or that even if he did fight kaido, he would struggle to hurt him. Many fans also doubted that Sanji would fight a yonko commander yet here he is. So just know, when you bet against Koby, you are betting against Oda's own writing style.
Robin is the perfect example of this. The last time she had a serious 1v1 was skypiea, and now you have her beating black maria, all while showing off new techniques like gigante fleur, demonio, and fishman karate.
Oda also held off from showing Zoro's true power for quite some time, we are 1000+ chapters into the series and Zoro just recently used asura for the first time post skip.
My point with this is that since the series is so long and not every character gets a spotlight every arc, when a character does have the opportunity to shine, when they are given a spotlight, Oda isn't going to disappoint the reader.
So lets take Koby and view him under this lens. Koby is a very important character, his dream parallels Luffy's and he played a pivotal role in marineford. Koby also didn't make an official appearance post skip until after WCI and not only is his mission at amazon lily the first major thing he's doing post skip, its basically the only major thing he's done apart from marineford.
With this in mind, does it make sense for Oda to set Koby up for failure? For him to not show Koby hundreds of chapters and then send him into a battle where he gets low diffed? The same guy who is supposed to be a future admiral? It just doesn't make sense. Luffy is fighting the yonko, Zoro and sanji are fighting the yonko commanders, and the rest fought the tobi roppo. Are we really supposed to believe that after 2 years of haki training from garp, Oda can't power him up enough to win at least one battle in the new world?
Personally, I think Oda has already given enough set up for Koby to win. We know that the marines have extremely high tech weapons, we know vegapunk and the SSG were supposed to replace the shichibukai, why can't Koby get a science upgrade? Maybe he could get an artificial devil fruit, or a sea stone weapon, or a raid suit, genetic enhancements, cybernetic enhancements steroids, literally anything.
Koby has no feats and his portrayal isn't necessarily bad, if Oda reveals that the SSG gave him an upgrade, he could easily create a scenario where Koby gets the W and I just don't know why he wouldn't do that given how Koby hasn't got a spotlight in 400+ chapters.
Apart from what I've already addressed, there's one other argument I feel like dominates this discussion when it really shouldn't.
"Koby is just a captain, he's clearly too weak to fight hancock"
To that I respond that Zoro technically has a bounty that's only 20 mil higher than pekoms and he scarred kaido. Koby is just a captain until he's not; we're headed towards the end of the series post wano, by the final war Koby should at least be a vice admiral. Whenever Oda holds off on revealing a character's true strength, there are inevitably fans who will doubt that Oda will surprise them. Many fans said that zoro would never fight kaido, or that even if he did fight kaido, he would struggle to hurt him. Many fans also doubted that Sanji would fight a yonko commander yet here he is. So just know, when you bet against Koby, you are betting against Oda's own writing style.