@AJ NAIR Like 99% of One Piece theories it's just a wild guess so until Oda sensei says otherwise Shanks doesn't have a brother.
For Garling just like you said he is supposed to be Shanks' father so it's just an hypothese that comes from OP Red movie
For Garling just like you said he is supposed to be Shanks' father so it's just an hypothese that comes from OP Red movie
All of you shall know the pain