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

Sasuke's Rinnegan could do everything that Madara's could. The only difference was that he did not have Limbo ... had the Rinnegan right from the get-go. This was likely because Hagoromo was ...

Sarada needs the Rinnegan if she wants to scale up to the stronger enemies in Boruto. She could obtain this power.