What if Orochimaru is only following Sasuke so that he can have an Uchiha body to do the Fushi Tensei (Living Corpse Reincarnation) on the list? I mean, the war can go in two ways. Either….
A: The Allied Shinobi Forces win, and Madara’s body is left as a corpse for Orochimaru to salvage (assuming he was reincarnated through Rinne Tensei).
B: Madara wins, slaughtering the Allied Shinobi Forces, leaving Sasuke’s corpse to salvage.
For Orochimaru, this is a win-win situation. Madara has the Rin’negan, and Sasuke has the Eternal Mangekyou Sharingan. Even if neither of these pan out, there may be a third option.
C: If Madara is halted from competing Rinne Tensei and cannot resurrect himself, Obito’s corpse would still remain. Orochimaru could salvage that, acquiring both the Eternal Mangekyou Sharingan and the Rin’negan.
So...whaddya think??? (I posted this on my blog, too [@randomakatsukirping] ... so no, it is not plagiarized.)