User blog comment:LordLuminous/Fairy Tail Chapter 411 Theories and Predictions/@comment-112.208.89.226-20141130084042/@comment-9595671-20141201083142

Yeah, Acnologia is stronger than Zeref and the things said during the GMG kinda cemented that the Black Dragon is our final boss. Until Fairy Tail has to actually fight against Zeref, I don't think that the series' end is near as after they beat Zeref they've gotta defeat Acnologia once and for all.