Zoro can kill Orochi before or after he defeats King.
You exaggerated so much zoro. Even though zoro made impressive thing , I couldn't understand but you stated to see zoro yonko level.
But I said what happened on the roof.
1. Base Kaido Dragon Kaido Hybrid Kaido.
What Oden cut which kaido , what zoro cut which kaido.
2. 9 scabbards attacked kaido. After attacking, Kaido said that you did not even harm OPENING WOUND .
Zoro left new scar or he hit same wound.
3. Enma is type of sword that can use ryou. Even if kaido see enma , he said I feel strange haki in here. What is the strange haki ????
4. All roof top scene , they made defense . Zoro saved Luffy several time. Impressive .
But even though zoros best attack did not affect kaido, after one blocking attack , second one is about to kill zoro .
That things showed zoro made impressive things. But he is not even a little bit close yonkou level.
And what have you seen to underestimate King ? It is hard to understand.
With side effects , zoro defeat king ?
Did you meet zoan type DF ?