Tbh, it's probably not. I think Orochi surviving and potentially having the ability to destroy Wano (knowing a secret on how to literally destroy the island) is the real ticking time bomb.
That being said, Kaido's info dump about new onigashima and a world of violence just screams more allied pirates are arriving at Wano (former Rocks members, BMP, etc) while the other WB remnants show up to support Luffy and counteract that.
Idk, just seems to me like where this is going
Bakkins has to come into play somewhere down the line this arc, not only because of her being a former Rocks member, but also due to her suggesting Weevil to find Marco & Luffy who are at the same place now.
Don't know how Shakky will be involved, we'll probably just see her in an interlude chapter reminiscing her time in the crew while sitting besides Rayleigh or something.
About the others like Captain John, Silver Axe etc..., knowing about Moria's past beef with Kaido and how he has them as general Zombies, I have to wonder if Oda will try tying those two plots threads. Especially with the speculation of Blackbeard coming at the end of this arc and how Moria can potentially be his underling now.
Do you really think Xebec is dead? A man of his stature and whose past exploits have yet to be fleshed out, not to mention how Oda isn't letting us see Kaido & BM even mention him once yet.
I'm not advocating him being alive on a random island waiting for revenge but curious on where Oda's taking his character moving forward.
The thing that bugs me the most is the fate of Kaido & BM in this arc. Do you really believe that they'll be defeated in Wano before realizing any of their goals pertaining to the ancient weapons?