User blog comment:FairyRaven/Fairy Tail Chapter 377, 378: The Sky Dragon's Rage & Friends Forever, Review and Commentary/@comment-37.236.184.55-20140328115751/@comment-7418318-20140328121730

You only need to look at the current part to see this.

Only the last two chapters out of eight were mainly about Wendy and still chapter 371 was called "Tartaros arc Part 2: Song of the Sky Dragon".

Maybe E.N.D. will reveal itself right in the next chapter, or in an extreme case only in the last chapter of the part, some seven or either chapters down the road.