The power over life and death
It's perfect. At the end of the manga he could use the power life to ressurect his clan and and power of death to destroy all the bijuu sealed in the statue ruining madara's plan. By then KB will have his extracted leaving naruto with the only bijuu in existence. Sasuke will die from using that ability on such an extreme level just like how pain died from resurrecting konoha, but sasuke will die in peace knowing his clan is revived. Naruto will be angered by sasuke's death, but not in the usual way. Instead of loosing himself to the fox's hatred, naruto will be filled with holy vengeance. He'll finally control the fox in sage mode and prepare for the ultimate fight against madara.