If Zoro really unlock black blade against King, then ZKK is sealed.
Zoro with Enma (former sword of Oden) with its ultimate form (kokuto) cutting the neck of Kaido above Wano like Ryuma with Shuusui (another black blade)
Gyukimaru vs Zoro's fight and discussion about Ryuma being the sword god and Shuusui would make sense.
@Peroroncino @mly90 @nik87 @ConquistadoR @Zowo
Waiting