Im thinking that The 4 Chinese Beast god will have a sort of role in this Story line...
(byakko, serryu, genbu, susaku)

Sasuke MAY contain a Red pheonix of some sort cause of something. (He specialize in fire jutsu alot)
Kakashi's dad was known as white fang, And kakashi got White chakra... He MAY be White tiger (Fang dont necessarily mean dog)

Genbu and serryu I got no idea...