If Zoro is serious about Ashura being his strongest...he should realise non of the other attacks won't do shit. And that he's not needed on the roof. I feel like Zoro is contempt with what he's done to Kaido and will probably leave it all to Luffy.
Zoro's plotline with Hiyori and Orochi will begin now. Hiyori will be the one to heal Zoro, same way she healed him before.
I hope Orochi awakens his fruit too.....
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If it's true that Orochi has one more head left than him and Fukurokuju could go full on Genbu form.
And Zoro defeats them like that. If Orochi has all his heads still....then Zoro can cut all his heads with Ashura simulatenously.