User blog comment:Xilinoc/Ch. 547 - Peace from Shadows/@comment-1904799-20130904204004/@comment-5657895-20130905144532

I think Arrancar arc was around five-six volumes in length, so it was short. It was mixed with the much more extensive Hueco Mundo arc, but if Kubo is mixing the two, then that would mean it would be about 26-27 volumes of about 9-10 chapters each, so over 240 chapters in total, and we've already done about 80 of them. I'm guessing the arc will be 300 chapters in total, so we still got at least 200 chapters to go.