Well he does have zetsu giving the info, and he did go off panel while going to obito. he could have easily made a clone. Edo tensei use of Kabutos and Orochimarus caliber is highly dangerous, it would make sense that he acquired kabutos help.Nooo!! Don't get ahead of yourself!! Madara has no reason to save him, plus he's having battle with the SA the whole time, it doesn't make any sense. Srry, I highly doubt your theory