Madara Uchiha
S15, E2: The reanimated shinobi appearing before Gaara and Ohnoki is revealed to be none other than Madara Uchiha himself; which raises the question of who the masked man claiming to be Madara really is.

S15, E2: The reanimated shinobi appearing before Gaara and Ohnoki is revealed to be none other than Madara Uchiha himself; which raises the question of who the masked man claiming to be Madara really is.