User blog comment:YuutaScarlett/Another Anime Break?/@comment-2125188-20140826183046

I think that Fairy Tail is generally ordered in 48 episode seasons initially. This is my theory.

Season 1 - 48 Episodes: 2 omakes & 1 filler were produced to reach the full 48 episodes

Season 2 - 48 Episodes: 1 omake & 6 fillers were produced to reach the full 48 episodes

Season 3 - 54 Episodes: I believe this season was originally supposed to be 48 episodes, but was extended to 54 to complete the Key of the Starry Sky arc. Since it was a filler it would've been hard to predict exactly how long the arc was going to last.

Season 4 - 25 Episodes: Was cut short from 48 episodes to 25 episodes after it got too close to the manga and the Grand Magic Games arc had no ending in sight. It was hard to predict that the Grand Magic Games arc was going to be 83 chapters.

Season 5 - 48 Episodes (Predicted): Grand Magic Games arc (30 Episodes) Filler/Omake episodes (10 Episodes) Sun Village arc (8 Episodes)

Right now there is a healthy gap of 63 Chapters so they don't really need fillers. However, i predict there will be 10 filler/omake episodes to reach he full 48 episode season. Whether or not there are fillers after the Sun Village arc will most likely depend on whether or not the Tartarus arc is completed yet.

One thing I can say with confidence is that i don't think there will be another hiatus anytime soon. The only reason there was a hiatus in the first place is because the Grand Magic Games arc was so long (83 chapters) that even 25 filler episodes (Key of the Starry Sky arc) couldn't help much. I just hope the Tartarus arc doesn't end up being too long (60 chapters max) and we end up with another long filler or hiatus.