User blog comment:Omega natsu2/Chapter 369: The Place Prayers Reach, Predictions./@comment-31.132.65.50-20140129025714

It's really amusing how people put their hopes on Midnight. He's a sociopath and have no reasons to help Jellal, quite the opposite. Besides, if you read chapter 364 again you will see that Midnight was still calling Brain "father" despite what Cobra said about him.

Here's the prediction. Jellal got hit for real. It's revealed that Midnight did something with Brain seals which caused Zero awakening although the rest of the OS were still standing. He did it when everyone was busy with the fight. He could have used his illusions to make everyone think he was passive when in fact he was unsealing Zero.