Not sure if this has already come up on here but Luffy specifically stating he'd end this fight with Hydra is pretty interesting and will prolly tie into Toki's prediction about 9 shadows bringing Wano to it's dawn. Onigahsima is currently above the flower capital so the citizens of Wano looking up to the sky and seeing 9 shadows (i.e Luffy's Hydra) ending Wano's night (i.e. Kaido) fits.
Also, at this point, imo it doesn't really make any sense for it to be the Azakaya 9 or specific alliance members. For the latter it'd mean 9 of the alliance members would have to be singled out to match the 9 shadows which is bit weird.
Also, at this point, imo it doesn't really make any sense for it to be the Azakaya 9 or specific alliance members. For the latter it'd mean 9 of the alliance members would have to be singled out to match the 9 shadows which is bit weird.