User blog comment:Miskos3/Fairy Tail Episode 228: Wizards vs. Hunters, Review/@comment-5303512-20150412133225

So, I have a thought when we get to the actual introduction of the Tartarus Arc "Tartarus: Prologue for manga readers", they will make it a one chapter episode filled with flashbacks on their fights with Oracion Seis and Grimoire Heart.