Oda made a special cover celebrating the arrival of One Piece Chapter 1000.
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As you can see below Zoro has three swords:
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The swords Oda drew there are:
Wado Ichimonji
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Enma
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Shusui
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Is that a foreshadowing from Oda that Zoro will leave Wano with Enma, Wado Ichimonji and Shusui? Zoro 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.
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In Chapter 1023 Hyogoro and Kawamatsu confirmed Zoro’s similarities with members of the Shimotsuki Family: Ushimaru and Ryuma. This cannot be a coincidence.
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*Theory by Fenaker