Here are my thoughts for this........
a) luffy V shanks will be a friendly Haki based battle like whitebeard V shanks.
b) shanks being the swordsman in his crew, Zoro will be the one to face him and in so ding he will measure his strength against mihawk against the man who always derw with mihawk.
a) luffy V shanks will be a friendly Haki based battle like whitebeard V shanks.
b) shanks being the swordsman in his crew, Zoro will be the one to face him and in so ding he will measure his strength against mihawk against the man who always derw with mihawk.