User blog comment:FairyRaven/Fairy Tail Chapter 414: Drops of Fire, Review and Commentary/@comment-7418318-20150105144646/@comment-5303512-20150106135119

I think the arc will officially end when they get out of this situation and everything cools down. Zeref hinted that "should they survive this hopeless situation" and "Will Acnologia end history again" this shows that the fight is not over.