I personally think Obitos fused with both Madara and Zetsu. The Ex Edo Madara dosen't seemingly know a lot about Zetsu, he hasn't called or tried to interact with him once, dosen't seem to even know of Sasuke, Itachi either, just some Super Power thats been asleep since before Nagato had the Rinnengan with J-Man training them.
Show Me How Much You Have Evolved...(As Tian walks toward an Army he's been waiting eons for).
I speak 4 languages...
English, Profanity, Sarcasm, and Real Shit.