Some speculate that Madara may have brought Obito back to life through the Rinnegan's Rinne Rebirth technique, coupled with ...

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

In fact, Nagato himself can be considered to be one of the very best users of the Rinnegan. Later on, Obito took this for himself, although he could only control one since holding the power of two ...