Board Thread:Episode Discussions/@comment-1181222-20170517110628/@comment-810492-20170517192644

Ravenlot 27 wrote: The cases of the anime-only characters becoming canon in the manga are really rare, and I know only two of them (Raiga and Utakata). What's more important, there's no single character from the movie who was adapted into the canon storyline. There's actually been quite a few more cases such as Guren and Yukimaru during the 3-Tailed Beast arc. Those 2 characters were brought back in one of the last episodes of Shippuden. I think there were a few more too from filler arcs that have been brought back or at least events from filler arcs that persisted throughout the anime even after the filler arc was finished. So it's not entirely out of the realm of possibility that this could be the first time something from a movie is brought into the anime. But you're probably right and this monster might be something totally new, but based on everything we know right now, it certainly does remind you of the Zero-Tails.