User blog comment:Omega natsu2/Chapter 359: Fairies vs. Hell, Predictions./@comment-94.13.89.18-20131116204247/@comment-1359322-20131117110759

Hopefully he'll appear in this arc as Tartaros' mastermind maybe after the Nine Demon Gates' defeat saying what the Nine Demon Gates were aiming for is just a distraction of his real goals with E.N.D. and several others Tartaros team appears.