an awesome guess but i think it will be kinda reverse…like marine tring to use anchient weapons and luffy and his crew stoping them..
like by uniting the ocean they may destroy all blue , the lang of seefolk...which is under luffies protection.about the prediction of oracle...if she saw what we saw its only flames with luffy. it can be he is tring to stop someone not destroying. but for now i wanna enjoy the great story of one piece. i dont care if its some rip off from history.it is still awesome. for near future i am very curious about samurai kuni and will there be a new crew member...