okay i've had a theory, a short one
the gorosei that luffy will fight has a copy ability, which can copy even devil fruit abilities. What if he copies every ability of each straw hat, and luffy has to beat them all (by this point they are the strongest crew to exist) to prove he is the strongest pirate.
the gorosei that luffy will fight has a copy ability, which can copy even devil fruit abilities. What if he copies every ability of each straw hat, and luffy has to beat them all (by this point they are the strongest crew to exist) to prove he is the strongest pirate.