Please, that betch kaidou only rules one island, like sterry or every random king warlord out there, at leats big mom rules totland that has like 100 islands in total.
sanji, the succesor to the throne of north blue rules like 25% of the entire world. it's like 25% of IM's throne.
btw sounds like sanji will have to team up with 3 more people on Im to take back the world and iron throne