True. And it's really suspicious that Oda change Nidai color from blue to purple, clashing with Enma color. I'm in with Hitetsu forge two Kitetsu into one new sword. Make it Blue color and name it Shin Kitetsu.
Zoro isn’t gonna wield all 3 Kitetsus at once. He will replace them with each other (Sandai —> Nidai —> Shodai). Sandai is a trash sword that is unworthy to be wielded by the WSS. All of WSS Zoro’s swords must be at least an O Wazamono grade
I think Zoro will take the Nidai and give the Sandai to Momonosuke after he hears that Momo did something brave this arc. Then Momo will evolve his Nitoryu with his father's sword and the new best samurai in Wano's sword, There's no bigger Motivation for this kid.
I said it before, Zoro will be the one that will receive Nidai. Either his Sandai breaks and he gets Nidai or Tenguyama will forge the Nidai and Sandai together to make a new blade. I prefer the latter.