Board Thread:Theories and Speculation/@comment-810492-20170517190024/@comment-25122992-20170517190849

While the negative emotions theme of both this beast and the Zero-Tails really seem to be similar, as you pointed out by yourself, Zero-Tails isn't actually canon and even if it was, it still had been destroyed. Also, only the theme is similar, the appearance already differs (Zero-Tails looks like a leech while Boruto beast has the appearance of a Nue).