[quote user="JAIF"]Why would any of this have anything to do with reincarnation?[/quote]
Ask yourself this, why would the Kyuubi compare Sasuke to this Uchiha Madara precisely? It's all spells out that the Kyuubi was referring Sasuke as Madara's reincarnation. Sasuke wouldn't know that he's an reincarnation just how nobody knows who they were during a past life unless they get an spiritual awakening or something. Hell, didn't Sasuke just reverse Oro's Living Corpse
Reincarnation. Maybe the reversal of the jutsu will have side effects like reawaken Madara within Sasuke.