I think this Chapter further strengthen the idea that Traitor is either Inu or Neko
Because we all expected that Traitor Sub-Plot would be hinted at in this Flashback
And now we've seen how all Scabbards joined Oden and Oda showed that in few Panels
But Chapter ending with Inu/Neko arriving at Wano shows how they have their own Sub-Plot
Oda could have made us truly exclude Neko/Inu from list of Suspects in Zou Arc and made us suspect others like Kanjuro & Kiku
But in truth, it's one of the Minks who is doing this and there are many Hints really
The fact that Oda still didn't answer us about the true reason Neko/Inu fought each other and what they were doing when Castle was burning is a Huge Hint, also Oda didn't answer us about how Guardians are so stealthy that even Luffy with his CoO couldn't detect them
Another Simple Hint is the fact that Neko & Inu are Rivals (Cat & Dog) so it makes sense if they fight each other
And they aren't just Rivals, they are both Rulers of Zou, so it's not far-fetched to say that only one needs to rule at the end
Also, let's not forget that Oda decided that Neko's Arrival be delayed (2 weeks passed and War is gonna start & Neko nowhere to be seen)
Which begs the question, why ? even Marco isn't sure to come, and actually declined, so Oda could have just made Neko return already
I think the possible reason Oda chose to make Neko arrive late, is so that he doesn't hear about this Traitor Thing because apparently he knows things about Inu that others don't, so he might suspect him or vice versa
More hints rely in the information that Orochi got, there are two things that were leaked recently, Location of Sunny & Moon Tattoo
Both these things are Info that didn't recently change, in other words, Oden's Allies had Moon Tattoo for a long time & Sunny was in that location since Luffy arrived, and yet Orochi got the info late, which means Traitor only heard recently
Moon Tattoo was revealed to those who traveled in Time, but Orochi didn't do anything about it, until Luffy & others arrived
So i doubt it's one of the ones who Traveled, Denjiro isn't shown yet, Kawamatsu was in Prison whole time & Ashura most probably knew about this Tattoo before anyone else and he didn't rat about it
So this only leaves us with Inurashi ?? right, or possibly Neko arrived and is hiding but that's far-fetched
Same thing for Sunny's Location, Oda made sure to create a Flashback that includes Usopp revealing Sunny's Location to Minks, i mean like seriously, it's obvious that scene was necessary unless Oda wanted to show us when Traitor heard the info and in that Panel, Oda insisted that it's the Minks who are listening
Not to mention that in Zou Arc, Sicillian really wanted to go with Luffy to WCI & Pedro didn't let him & told Neko to give the order
I mean that scene didn't show us Luffy & Co. picking Pedro to go with them because many volunteered, but it actually showed us that Sicillian can't go, why would Oda do that ?
And remember that portraying someone outside of Wano as Traitor is completely acceptable and better than suspecting someone from Wano
I honestly don't see how is Oda gonna use this Sub-Plot, and if he can explain why one of Minks Rulers is Traitor and what he is doing it for
But we can't deny the many hints out there, and c'mon let's be honest, even though i was among the very first who suspected Kanjuro, i doubt someone like him or Kiku or Shinobu are Traitors
This Sub-Plot have being present for ages now, so the revelation should be great and Traitor should be a Character that is really focused on.
Kanjuro haven't done anything, isn't an intimidating character, not that strong compared to Top Scabbards & u saw how Oda didn't focus on him much in Flashback or anywhere in Story really, same for Kiku & Shinobu
As for the possible reason why Neko or Inu would be a Traitor, it's simple
Oda made sure that Neko & Inu are among retainers who joined Oden in his Travel (Along with Izo & possibly Denjiro explaining his absence)
And if we remember Rayleigh's words from Sabaody, he said that not everyone would have same conclusion & opinion about what they find in the end (One Piece & Poneglyphs Story ... etc)
So what if Inu & Neko actually have some knowledge they aren't sharing, what if this kind of idea conflict is what made them opposites
Possibilities are endless really