Board Thread:Naruto Discussions/@comment-5413572-20141206200019/@comment-5413572-20141219053713

The Tenseigan just made me even more dissatisfied with how Kishimoto handled things. Again, I would've had it where Kaguya had the Gōkeigan, which subsequently split into the Rinnegan and Tenseigan (which would have the added benefit of explaining their similar power levels and abilities, i.e. Truth-Seeking Balls and Toneri's equivalents). The Rinnegan could've then diluted to the Sharingan, while the Tenseigan could've diluted to the Byakugan. Then, just as recombining Hagaromo's two bloodlines (Asura's and Indra's chakras) would produce the Rinnegan, combining Hamura's two bloodlines (the remaining Otsutsuki and the Hyuga) could've produced the Tenseigan. Simple, elegant, and dovetailing well with other aspects of the series. It could've also had interesting applications for a future movie, as Sasuke's Rinnegan and Tōneri's (or I suppose by the end, Hanabi's) Tenseigan could've been stolen and implanted in a new antagonist, who could awaken the Gōkeigan.

Instead, we got a bizarre, out of nowhere, and ultimately meaningless dojutsu. I don't begrudge Kishimoto too much for this, but it seriously seems very cobbled together.

Also, a quick side note- how in the world did Hamura and the Otsutsuki observe humanity from the moon for a millenium if none of them had eyes?