Board Thread:Theories and Speculation/@comment-32532926-20170710053140/@comment-734582-20170710084859

As others have pointed out, the problem with the tenseigan is that the conditions to awaken it are relatively hard to justify in Boruto. Or rather, while it is indeed possible for Boruto to have inherited the eye, considering the amount of power in Naruto and Hinata, it's hard to justify that only this particular power manifests of all the far easier to manifest powers.

Hinata could see spirits with her Byakugan. Nobody freaked out about lingering spirits before Pain revived them, nor did they freak out over the Shinigami or King of Hell, implying that this vision doesn't exist commonly among the Hyuga. It's also probable that Hinata did not possess this power until later in the story.

So Boruto's eye can't see 360 nor chakra pathways, looks like a Byakugan (sort-of, moreso in the manga), can see spirits and is a dojutsu.

Now here's the deal: Hinata's ability to see spirits can be linked to a specific event, namely her getting Kurama's chakra in the 4th war. If this power awoke some sort of hidden KKG (or normally-dormant power of the byakugan), it could explain why she can see spirits now but not later. More importantly, Boruto has the whiskers of Kurama, implying he has some of that chakra. With the blood of the Hyuga flowing through him (mentioned specifically by Momoshiki), and some of that chakra, both Hinata and Boruto share a power and the means to awaken it.

The one thing it doesn't explain is the connection to the Nue, but i find it probable that Boruto has some of it's chakra somehow, which could explain why he could summon it (a contract can be formed if one has sufficient info, e.g. DNA but chakra works too) and why his eye reacts to it.

More importantly, it's a theory that doesn't require very specific awakenings or powers and relies on both established powers and canonical evidence.