Board Thread:Theories and Speculation/@comment-1872728-20160404064008/@comment-24824859-20160405022921

Georgio722 wrote: It took Madara decades to activate the Rinnegan, so it's possible that it applies to the Six Paths Sage Mode as well. Plus, maybe it doesn't work because they don't have the Asura/Indra chakra anymore, as they are now inside Naruto/Sasuke. But that's not how SPSM works. SPSM is not the equivalent to the Rinnegan, it's SPS(Six Paths Senjutsu). SPSM is only unique to Naruto. If Madara were to bitten off Hashirama while he was in Sage Mode, Madara would've still awakened the Rinnegan