User blog comment:Omega natsu2/Episode 182: The Burning Earth, Review./@comment-76.187.75.31-20140521011834/@comment-7418318-20140521090624

I have bad news for you: Zeref won't show up until the very last episode of this arc, which is still some 35ish manga-chapters ahead. If we go by the usual 2 chapter to 1 episode as a minimum, that means unless the anime team makes drastic changes (which is unlikely) Zeref won't show up until Septembre at the earliest.