McGregor seemed to confirm his acceptance of another 12 rounds with the former pound-for-pound king. Brace yourselves, boxing world. Rumors are beginning to swirl that we may be in line for another clash of the titans as former MMA champion Conor McGregor put up a curious post on his Instagram page, suggesting that he ‘accepts’ a rematch against Floyd Mayweather Jr. View this post on Instagram A post shared by Conor McGregor Official (@thenotoriousmma) This iteration of talks involving Mayweather and McGregor is really sort of emerging with not a lot of hardcore substantiation here, but Fight Hype — who…