Board Thread:Naruto Discussions/@comment-24514198-20140604211103/@comment-24938412-20140711205205

Kaguya alone seems too underdeveloped and one-dimensional to hold the role of final villain. (still waiting on some complex backstory) At least, it is Kaguya+BZ, as this two-side antagonist archetype has been done before, though it is not very common I think.