
Originally Posted by
Splash!
I think the powers Madara received from the first are what allowed him to awaken the Rinnegan. Probably because of combining of the powers of the Uchiha and the Senju. Remember how those clans are supposed to be the descendants of the 2 sons of the sage of six paths. Although the 1st may have been stronger than EMS Madara, I don't think that's the case with Rinnegan Madara and his Meteor tossing abilities.
Maybe fake Madara hopes to cultivate a fresh pair of Rinnegans by having Sasuke and Naruto duke it out and combine the Uchiha and Senju powers from this generation.