User blog comment:IamJakuhoRaikoben/Chapter 443: And Then, The Land Was No More, Review./@comment-26416024-20150706143444

Well they can win if Natsu gets his sealed away Etherious powers and memories back. He needs to be powerful enough to defeat Zeref and Acnologia and I think it's a given that those 2 are more powerful than any of the Sprigan 12.