User blog comment:Miskos3/Fairy Tail Episode 240: Tartaros arc: Where Prayers Go, Review/@comment-1359322-20150704054002/@comment-7418318-20150704075958

Looking at it, the stuff that happends in the manga chapter "Demon's Reincarnation", which is also the title of the next anime episode, is stuff that happened in this episode.

I guess that means they'll put in at least half an episode or maybe even a full episode worth of anime-exclusive stuff. Otherwise it should have been called "Tartaros Arc Part 2 Song of the Heavenly Dragon".