User blog comment:Miskos3/Fairy Tail Episode 258: Tartaros arc: The Fire Dragon's Iron Fist, Review/@comment-5894890-20151107042737/@comment-2125188-20151107084406

I think a break is inevitable (I believe the Alvarez Empire arc will be a very long arc, that not even a 6-month filler would prevent the anime from catching up).

I don't think the break will happen any time soon though, given the manga is about 58-60 chapters ahead and also the fact they seem to be pushing out heaps of FT stuff recently (new movie, ova, games, spin-offs, novels, figures, monthly ft collection) and probably don't want to stop the momentum at the moment. It's just a matter of when in my opinion.

I don't think they will take 2 years off, as that would really hurt manga sales and the franchise as a whole. It would more likely be 1 year like last time. I don't think they will slow down the pacing like One Piece or adding random flashback fillers like Naruto, cause that's the reason they took the break last time, so that the anime doesn't have to compromise in order for the show to continue.