I see a lot of people on here today saying that the reincarnation of Indra is Madara and then some say no its Sasuke. I believe it is both. Madara was the reincarnation of Indra just like Hashi was for Ashura. But like it has been explained once Madara and Hashi died it was passed to new generation thus Naruto/Ashura and Sasuke/Indra. That's easy enough to understand and through the cooperation of Naruto and Sasuke thus Ashura and Indra the sages dream of peace will finally come true once this happens.