Every story has an ending. How do you think their story continued? What's your version? Mine tells that they made up, eventually. They lived in peace, after all these years summed up then I'm sure that their brotherly love could be restored. If Hanzo didn't love Genji and regret his actions, he wouldn't come to the Shimada Castle every year to pay respects. And as we know, Genji has forgiven him.