User blog comment:Mythical zoan fruit enthusiast/I'll never forgive you!!! Unless.../@comment-5962458-20130810160714/@comment-9787781-20130810230345

Sure Ace lost to him fair and square but thats not how I see Luffy reasoning it out. To me Blackbeard got one of Luffy's family killed and you don't forgive that. To be Luffy's friend or family it means that whatever pain you feel Luffy feels it too and will support your goals. So no I don't think Luffy is ever going to fight side by side with Blackbeard.