As the title says, decided to focus this topic around Zoro and the Shimotsuki inherited will, so lets start
Link between Zoro and the Shimotsuki
Oda revealed in an SBS that there was a link between Zoro's lineage and the Shimotsuki's from the Wano country
And the background around it was resolving around the fact that a former Wano citizen(Shimotsuki Kozaburo) left out to sea 55 years ago and founding the Shimotsuki village(the village Zoro grew in), teaching them the way of sword, as well as the word "Sunacchi", which is an important expression for a samurai when he wants to
throw away his name and act like a child.
And in the chapter 1023, Kawamatsu brought up the fact that there was a reason he couldn't bring himself to stop Hiyori in giving Enma to Zoro, with Hyogoro understanding, noticing the similarity between Zoro and Shimotsuki Ushimaru, with Ryuma(another Shimotsuki, ancestor of Ushimaru) not only being also similar to him, but also being described as a one eye swordman
This basically further hinted to the possibility that Zoro's lineage was linked to the Shimotsuki
Inherited will
As mentioned above, there is a link between Zoro and the Shimotsuki brought up by Oda, but it appears to go even deeper than that
- Zoro created a bond with Shimotsuki Yasuie that pushed him to want to avenge his death
- It was mentioned during Yasuie's execution that the daimyo wanted to oppose Orochi / Kaido, but failed due to Kaido's strength
And among the daimyos in question was Shimotsuki Ushimaru's(Zoro's splitting image) who even after his defeat, never wanted to yield / bow down to Kaido
Onimaru was Shimotsuki Ushimaru's companion(and thus should have noticed the similarity between Zoro and his former master). It's likely then that he felt something with Zoro, hence his disappointment in realizing that Zoro was not understanding the true value of Shusui, a word that bothered Zoro
And Kawamatsu brought up the fact that Zoro coming to Wano, returning Shusui is fate
Indeed, the Wano citizens worship Ryuma as a god(God of the blade), to the point Onimaru literally linked the Wano tragedy to the robbery of Shusui incurring Ryuma's wrath
But with Shusui having returned where it belongs, they view it as a sign of hope, of Wano returning to it's former glory
Which should all lead to Zoro being perceived as a second coming to Ryuma, inheriting the Shimotsuki will
That's it for me, so feel free to discuss