I said it multiple times, and I don't get why many see it as an impossible scenario
the direction of the story is for Rocks pirates to be the main villains from now on, and Wano is a build up to that
introduction of Rocks in Wano arc, and calling Kaido and BM alliance as Rocks pirates return, while several other Rocks members are being teased like Shiki in Oden flashback, Weevil mother, Shanks worrying about a certain pirate, and who know what's next
i think it's very fair assumption lol it doesn't make sense Big Mom to fall here, Kaido still full of mysteries even tho we're near the end of Wano, the alliance between the two seems pointless and random if it's not gonna lead to anything substantial...ect
also it's obvious Rocks existence won't mean anything if supposedly the only two alive members are already dealt with, why the story of Rocks even exist then? Rocks pirates introduction can only be meaningful if it affect the current story