Well it's been awhile since I decided to make a theory post.
It's a pretty quick and simple one. Does anyone else get the impression that Madara will double cross Obito? Perhaps infinite tsukuyomi isn't all that Madara made it out to be.
What if it were to turn out that all Madara wanted was the power of the SO6P and in an attempt to gain it, he's manipulated everyone from the grave (including Obito) into helping him attain just that?
So the question is... how likely is it that Madara is planning something completely different from what we've come to expect?