Board Thread:Theories and Speculation/@comment-810492-20170517190024

So in the most recent episode, Boruto further described the mysterious chakra as manifesting as a sort of monster like creature. He asked his friends if it's possible for chakra to manifest as a monster, showing no one has knowledge of the tailed beasts, but at the same time implying there's some relation to the tailed beasts. Also, so far, all the descriptions and effects of this possessing chakra totally matches that of the Zero Tails. The Zero Tails appeared in one of the early Naruto Shippuden movies, either the first or second one. Both entities seek out people with negative emotions feeling sad or frustrated, and then possesses them causing them to go on a rampage while absorbing their negative energy at the same time.

I know the Zero Tails is considered move only canon, and most Naruto movies are not considered canon in general, but perhaps it's possible they're bring back the Zero Tails for whatever reason. After all, whatever this creature is, it's description and effects both match that of a tailed beast and the zero tails too. 