What I think will happen.
This is somewhat detailed scenario, so it's not particularly probable. Nevertheless, this is the kind of progression I expect from Zoro going forward.
@HA001, @spawn, @style, @KiriNigiri, @Reborn.
- Zoro lands in the Wano mainland.
- Maybe he gets picked up and treated by someone.
- He either meets or is found by Gyukimaru and/or Hitetsu.
- He learns stuff/we get a lore dump:
- Black Blades
- Enma
- The Shimotsuki
- Cursed swords
- Meitou
- Etc.
- Swordsmanship development
- He might forge Enma Black
- He might receive the Nidai Kitetsu.
- He arrives in the Flower Capital and witnesses the end of the Fire Festival.
- Dragon form Kaido tries to destroy the Flower Capital in a massive Boro Breath.
- This would presumably be after losing to Luffy in a 1 vs 1.
- Zoro cuts the attack and then beheads Kaido with Hiryuu Kaen.
This is somewhat detailed scenario, so it's not particularly probable. Nevertheless, this is the kind of progression I expect from Zoro going forward.
@HA001, @spawn, @style, @KiriNigiri, @Reborn.
The huge and massive gaping hole in this headcanon is Zoro is damaged beyond belief so other than a huge asspull of mink cum Zoro doing anything significant to an enemy is the worst writing possible.