User blog comment:Besteverunited/Do you think after the tartarus arc there will be a break in the anime or is the new manga arc designed for this reason?/@comment-125.212.122.66-20150225064221

If Sun Village + Tartarus arcs will air for 3 cours (2 chapters/episode), the manga will only be ahead by about 48 chapters then. There must be a filler arc if the anime continues. Maybe they will animate the spin-offs of the main characters like Gray, the Fairy Girls, Natsu's training or maybe FT Zero.