User blog comment:Ranger94/The next Arc/@comment-24769684-20150917202020

I don't believe we're going to find out who cut off Zephyr's arm since it's noncanon and doesn't affect the main story. Besides, Z lost his arm 10 years ago, so the person who did it likely became a Shichibukai before the series started. Mihawk and Doflamingo come to mind.

I think that the Twirly Brow Pirates are currently on Zo, but the Zo arc will likely just be setup detailing the Heart Pirates reunion, finding the strange girl, and getting more information about the third samurai. After that will come Wano. I'll write a blog soon detailing these upcoming events.