Who is the masked man in Naruto?

Not yet made public.

But there is speculation.

I think Uchiha Kagami is most likely to be shot. Uchiha Kagami is the teammate of three generations of Huo Ying who appeared in Memories of Time Past. Origin: Country of Fire, Ninja Village of Konoha (Neibo clan)

Former teammates: Shimura Danzou, Sarutobi Hiruzen, Mitokado Homura, Utatane Koharu and Akimichi Torifu.

Sarutobi Hiruzen was 69 when he died, and Shimura Danzou was 72 when he was assassinated, so Uchiha Kagami may be around 70. Judging from the half face when Teddy boy took off his mask against Hoshigaki Kisame and the eyes and forehead exposed on the broken mask when confronting Peony, Teddy boy is already an old man. So it's very possible: A Fei is Uchiha Kagami who was pushed out to find another way out. Compare the pictures carefully: slender eyebrows and deep eyelids. ...

A Fei has always called himself Uchihiro Madara, but Uchihiro Madara's age should be between 85 and 95. Besides, the real Uchihiro Madara has been summoned to fight Gokage and reincarnate with filth. Therefore, A Fei won't be the real Uchibo Madara.

Look at this photo, the hairstyle is like wood!