Potential Successors to Naruto Uzumaki: Sasuke Uchiha, Hinata Hyuga, Sakura Haruno If Naruto were to die prematurely, his peers Sasuke, Hinata, and Sakura would be likely candidates to inherit the Nine-Tails. Sasuke's power could easily overpower and control it, driven by revenge and protection. 

Sakura's close relationship to Naruto and her husband Sasuke would also make her a potential successor. The Nine-Tails could greatly enhance Sakura's physical power and techniques. 

Hinata Hyuga, despite being ranked lower in power, possesses innate talent and the Byakugan bloodline. Her love for Naruto could lead her to inherit the Nine-Tails or awaken the Rinnegan for vengeance.

 

Successors to Boruto Uzumaki: Kawaki, Himawari, Mitsuki, Sarada If Naruto and many peers died, Naruto's disciple Mitsuki and his children Boruto and Himawari would be the likely successors.

 Mitsuki already has a close bond with Naruto and has learned from him. It would be fitting for Mitsuki to inherit the Nine-Tails. Boruto and Himawari also have a good chance, but Boruto's rebellious nature may lead him to choose Sasuke's Rinnegan. Himawari has expressed a desire to become Hokage and greatly admires her father. Sarada Uchiha, Sasuke's daughter, could also inherit the Nine-Tails.

No Successor, Regaining Freedom for the Nine-Tails Since the Fourth Great Ninja War, Tailed Beasts have had the freedom to choose their own paths. If Naruto were to die, only those recognized by the Nine-Tails could inherit it, otherwise, it would be forcibly sealed and used. If the Nine-Tails did not want a successor, it could regain its freedom upon revival, but there is still a chance of it being controlled again.