Re: Answer this question and i will give you the best theory
I think Yata Mirror and Blade of Totsuka died with Itachi. They're spiritual items so I'm thinking that those items are attached to the spirit of the user.
We have yet to see the "Magatama" jewel necklace which according to Shinto lore is the most important out of the 3.
You know what I find interesting? "Yata No Kagami" translates to "8 Span Mirror" and the raven that came out of Naruto's mouth, which I think is called "Yatagarasu" translates to "8 Span Crow".
According to Shinto legend, Amaterasu sent Yatagarasu to aid an Emperor to victory. Yatagarasu is the symbol of divine intervention in human affairs. In the most recent chapter, Itachi uses his Amaterasu eye (right eye) and the crow comes out of Naruto's mouth. Coincidence?
EDIT: No where does it say that Itachi's eyes contained those items. They are SPIRIT ITEMS, not SHARINGAN ITEMS. Susano'o carried them but it does not require Susano'o to work. Furthermore, Itachi transferred all his MS abilities into Sasuke yet we saw no sign of the 2 legendary items. It's safe to assume that he does not.