User blog comment:Axlorg89/Fairy Tail Filler Arc Incoming/@comment-25405856-20140921131612/@comment-2125188-20140923061213

Don't think this arc will be as long as the Key of the Starry Sky arc given though the gap between the anime and manga is 62 chapters, but they may also want to play it safe and wait until the Tartarus arc has ended in the manga, after what happened with the Grand Magic Games arc.