Board Thread:Naruto Discussions/@comment-24120130-20140607191120/@comment-25028454-20140624003402

I could be dead wrong about my theory but I believe that not only it's the Rinnegan that Kaguya has but it's a fully complete Rinnegan unlike Hagoromo's (even though his is no slouch at all). And as powerful as Sharingan may be, it's nowhere near the power that Kaguya possess' with her Rinnegan even with it's EMS power. So yes to me it's the Rinnegan but a more powerful version that even Hagoromo may not complete with because it took him and Hamura (his brother) to seal her away.