Mihawk is going to Break it during the Davy Back Rematch to show Hawkeyes Absolutely Clears Oden and that Zoro still isnt Close Wado Ichimonji with become Black during the battle as a Consolation Prize tho
Kitetsu III, and Enma Will be Broken
Zoro goes to the rest of the story as a 1 sword style swordsman understanding what is a "black blade" with Black Wado Ichimonji beating Shyiru
Zoro takes Shodai Kitetsu from Nusjuro to replace Sandi and Nidai on the Return to Wano to Replace Enma
He then Challenges Mihawk Understanding how to forge a Black Blade Making all 3 Black before his 3 round With Miahwk