What are your thoughts on 4 sword style and 5 sword style Zoro?
I think when Zoro defeats Mihawk, he'll offer him Yoru as proof of victory but Zoro will reject that and take the Koganata knife he fought him with when they first met instead
as for his fifth, it'll probably be a sword that has eaten a zoan so he can fight with it hands-free while wielding his other swords