Imu sama
Yessss... that OR the Giant strawhat in Marojoa actually belongs to someone there who was kept in a preserved state... where when it's time... Imu-sama Awaken this person....
So, it's either this or that... either Imu + 5 gorosei..... or Imu is just sitting on throne for this guy who owns the Giant strawhat... and he's in a preserved state and will be awakened once it's time for the WG to start their purge and final war is happening....
I know many theories are speculating that the owner of Giant Strawhat is Joyboy.... BUT MAYBE, just MAYBE that is not the case, and the owner is the antithesis and enemy of Joyboy while Joyboy is the owner of the smaller strawhat and it has been passed down until it reached Roger then Luffy...
Anyway, it's 5 Gorosei + the Leader be it Imu-sama or someone Imu-sama serves and sitting on the throne temporarily for him