User blog comment:Miskos3/Fairy Tail Chapter 367: Jellal vs. Oracion Seis, Review/@comment-5598380-20140118015003

So Brain turns into Zero. Maybe it's because Erik, Sorano, Sawyer, and Macbeth is losing the will to fight after Jellal said he will free them. Richard also didn't want to fight Jellal. Zero emerges when the five of them are defeated. This time, they will surrender to Jellal and that's the same as admitting defeat therefore Zero returns. I guess that all of them will fight Zero, including Meredy.