User blog comment:IamJakuhoRaikoben/Chapter 451: Fairy Heart, Review./@comment-114.79.32.97-20150908114833/@comment-24367018-20150908121400

Who knows? Although with all the hubub with Ankheseram's curse going on over the past few chapters, I've a feeling that Acnologia's not gonna be the final boss. Or, if he is, it'll be in conjunction with Ankheseram and/or Zeref.