god of the underworld imo. big post in the theory forum about it. i think Saint Shanks is the guy at the top of all the weapons sales, devil fruit trade. all those guys who showed up to big moms party like du feld and giberson and drugs peclo work for Saint Shanks and "the underworld" is his territory.
luffy and him will fight and it will be the most epic shit anyones ever seen. that "pirate with an eyepatch" Oda talked about is Luffy after Saint Shanks stabs his eye out to start the battle and calls back to chapter 1.
Saint Shanks: "You have to take me seriously. Show me how tough you are."
Luffy: "It doesn't hurt a bit."
:cheers: