Board Thread:Wiki Discussions and Support/@comment-2140588-20141219170959/@comment-1512913-20141221125916

When "Tobi" debuted (Sasori ring scene), Zetsu called him an idiot. Contextually doesn't make sense had it been Obito. I doubt Zetsu would have called Obito names back then, considering Obito was "Madara" Not to mention Obito already was a part of Akatsuki, while Tobi was like: "Now I'm a member too" (after taking Sasori's ring)