Wano is Zoro's Arc similar to how whole cake island was Sanji's Arc and here is why:
solid thread
@ZoroSlaysDragonTuna
the rest of your points are solid but this is where your argument is wonky
central theme in ennies
in otherwords the plot ,cause for conflict between cp9 and the strawhats was nico robin
the entire plot revolved around her character
we also got a flashback
her history and much more .
whole cake island
similar thing here
sanji is the reason the strawhats took a detour in wci in the first place .
sanji is the cause of conflict.
we get an expanded backstory, sanji gets to show his worth to the crew as a cook etc.
Wano
here's why saying its zoro's arc falls flat
- central story has revolved around oden
- cause for conflict is oden
- his children both momonosuke are hiyori are both key in ending or gaining an advantage in this war. (at least to king).
these other points
- Zoro had a connection to Wano another time after, When he met Ryuma's Corpse
- Zoro could be a Shimotsuki himself there is alot of hints towards this but the obvious one is Zoro being a resident of the Shimotsuki village. I am pretty sure we will know in this arc the same way we knew about Sanjis lineage in WCI.
hasnt been touched/confirmed within the story yet . at least not in this arc.
Zoro Received Enma, The sword that cut kaido, The sword that inherited Odens will to cut down kaido. This is not a coincidence that Zoro was given the sword. If plot needed luffy could have got it and zoro could have been given any other sword, Or maybe stayed with shusui, Giving Zoro Enma is important to highlight that this is Zoro's Arc, And that Zoro will be the star of the arc.
gaining massive feats doesnt make it his arc.
see sanji(lol) and robin's arc .
heck even killing kaido doesnt make it his arc.
it just makes him zoro , likely the second most important piece in this story in general.
so this point
''Zoro had many 1v1 fights in his own in wano. He fought 3 super novas.(fought hawkins killer and apoo), clashed with kyoshiro and others.''
along with fighting 2 yonko doesnt make it his arc. if we were to look at it this way , then technically almost every arc is luffy's arc. certainly not the case, zoro is prominent in wano because he is prominent in one piece in general.