User blog comment:Stone Roger/Natsu and Zeref have somekind of relation?/@comment-77.194.131.200-20140810095802

I found something about the current arc, it seems it was in the volume 39 : http://forums.mangafox.me/threads/508518-Tartarus-arc-entire-story-of-Faiy-Tail-will-change-in-a-big-way-big-mystery-solved

is it true ?