Board Thread:Naruto Discussions/@comment-25212736-20140722185642/@comment-24531362-20140723073410

JOA20 wrote: Unlikely. When Madara teleported to Obito's dimension, we can see Obito's right Sharingan and it was not in its Mangekyo form, not to mention that Zetsu and Madara couldn't synchronise their actions since they were in different dimensions.

Obito's Sharingan has NEVER been in Mangekyo when using Kamui, save these past few chapters. Part of the whole Tobi is Obito twist. Also, Zetsu and Madara had been in sync over very significant distances prior to this, such as when Black Zetsu was called to the battlefield in the first place. Chakra is still detectable in the dimension, or else the others wouldn't have commented on the lack of chakra detectability from Kaguya's dimensions. It is possible that Zetsu, who was passing as a manifestation of Madara's will, was able to read his intensions in much the same way as Pain controlled his corpses through his chakra receivers. It is totally possible that Zetsu could have feigned obedience and opened a portal.