Naruto lost Kurama's power against Isshiki, while Sasuke's Rinnegan was taken by Momoshiki. Boruto: Two Blue Vortex focuses on side characters and provides hope for Naruto and Sasuke's redemption.

Sasuke could finally regain his Rinnegan in Boruto. This power up could allow him to compete with other characters.

Momoshiki's Rinnegan absorbed chakra ... ninjas under a Kage but who stood out as the strongest of the lot in Naruto? Sasuke's Rinnegan could do everything that Madara's could.