There are 3 treasures, all of them temporary like the kazekage treasure we had before we got the kage one, which offer as a 210 scrolls ninja the 3 edo tensei jinchuriki and the 2 rares are another "normal" jinchuriki + respective kage.

That said, CN till now has never offered kurama and madara in events, only edo hashirama frags.

Apparently, CN also never offered sasuke and ay frags, since almost anybody has them over 3 stars.