Recently Oda made a special cover celebrating the arrival of One Piece Chapter 1000.
As you can see below Zoro has three swords:
The swords Oda drew there are:
Is that a foreshadowing from Oda that Zoro will leave Wano with Enma, Wado Ichimonji and Shusui? Him gaining Shusui means that the Wano citizen recognised Zoro as a second Ryuma especially Gyukimaru who always denied the possibility of returning the sword to him.
*Theory by Fenaker