User blog comment:Miskos3/Fairy Tail Chapter 369: The Place Prayers Reach, Review/@comment-24228963-20140131104354/@comment-7418318-20140131105549

Since Tartarus might be serving Zeref, I wouldn't discount the possibility just yet.

Or CS might try to capture one of the 9DG so they can interrogate it for Zeref's location, or because they need one of Zeref's creation to trace his magic and find his location that way.