Board Thread:Theories and Speculation/@comment-25043344-20150712073834/@comment-734582-20150712143237

Ninja Of War wrote: Sasuke mastering the rinnegan, using it's powers combined, using the asura path to develop a mechanical left arm with weapons and such... Actually if we go by their main Six Paths powers (Yin and Yang) it's clear that the Six Paths powers themselves are arranged by Spiritual and Physical abilities:

Deva: Yin (Spiritual) Asura: Yang (Physical) Human: Yin Animal: Yang Preta: Yin Nakara: Yang

So Sasuke would have Deva, Human and Preta Paths (two of which he already showed) and Naruto could have Asura, Animal and Nakara paths. It's ironic since Indra was a Deva in the original mythology and Ashura an asura. Not to mention Human involves interrogation ("the ones who know everything", remember?) and Chakra stealing(curse mark, Itachi's eyes) for Sasuke and body augmentation (Sage, Kurama mode), Summoning (frogs) and Hell (he has a literal demon: Kurama) for Naruto.

It's obviously just a theory but it does fit their individual themes nicely too