Howdy One Piece fans! I had an idea of what Gorosei were talking about… So I’ll step it by by order of their sentences. I’m not 100% sure about it, it’s just my opinion after reading the last chapter.
“I Presume We Have Nico Robin In Custody Already”
It shows that they don’t have live information but more like reports bit by bit, so they are not aware of Zunesha yet otherwise they’d know for a fact that Robin is still not apprehended.
“When Kaido And Big Mom Are Involved In A Fight….Death Could Easily Come For Anyone! Which Makes It The Perfect Cover To Eliminate Inconvenience”
The inconvenience they are mentioning here is most probably not a pirate. Why would they need an excuse such as a war for their disappearance?
What they did hear during some reports is the presence of somebody being acknowledged by the samurais as the true heir of Wano: Momo since it happened before the raid started. This could create issue for the World government to rule over Wano without looking like bad guys. I see this as a political “inconvenience” for them and using the war as an excuse for his death, so they don’t look bad.
“That Fruit Is Only A Legend Now, Even To Us! It Hasn’t Awakened For Centuries Upon Centuries! Then Why Would The World Government Bother To Give That One Specific Devil Fruit Another Name?”
From the reports, they had information about the samurais coming back from the past BEFORE the raid started. Orochi confirmed that veracity to CP-0 from Kanjuro being his spy and his intel (and the way of transmitting them) reappearing 20 years later. That “true heir” Momo is becoming more likely and real if you believe that Devil Fruit allowing Time Travel is actually real.
I believe the Toki Toki no Mi fruit is the one they’re talking. Toki’s multiple jumps in the future explained perfectly the absence of it for centuries and during her presence with Oden we never saw her fighting nor that she’d need to use again the power so No one knows about its existence.
About the annals, maybe they’re referring to the book Blackbeard used to find Yami Yami no Mi? Plus, it is kinda weird that Toki Toki no Mi is the fruit of “Toki”? Maybe related? To me, it makes more sense this way than Zunesha being a devil fruit user since they are not aware of its presence. Luffy’s fruit is known from them for AGES, even before Summit War. If it was that bad of a situation for them, why would they wait so long to eliminate it? Same goes for Law, even though it did have a nickname, they were aware before adding Law as Shichibukai.
Why is Zunesha here?
It might be multiple reasons obviously but my guess is that Zunesha has heard Luffy’s call while he was in the Ocean and started its way from there. The submarine wasn’t getting clear information, they were “driven” towards him without knowing what was calling, but Momo managed to delay very clearly his message to everyone! Why is that?
Momo and Luffy have something in common, they both heard Zunesha during Jack’s attack: The Voice of All Things. This power has been redundant from the very beginning, but lately more and more aiming towards Zunesha. We don’t know much about the specificity of that power, so maybe its reach could get to Zunesha and bring it here!
Although, I would agree on the fact that… Zunesha might be pretty fast if that’s the case. But it’s been walking randomly for so many years ! And as of now, it could be near the place Luffy has called.
Theory by Tall_Appearance_6019 (https://www.reddit.com/user/Tall_Appearance_6019)