It's gotta be Obito. Because Kakakshi lead a team during the 3rd world war which is discussed in the recent release of the manga... if you look up the kannabi bridge which is mentioned in the recent manga as well in Naruto Wiki, it states the following:
The Kannabi Bridge (神無毘橋, Kannabi-kyō; Literally meaning "Bridge where the gods do not help") was a large bridge, spanning a river somewhere in Kusagakure. During the Third Shinobi World War, this bridge was a vital pathway to Iwagakure's line of supply. Team Minato, led by newly-promoted jōnin Kakashi Hatake, were given the mission of destroying it. They eventually succeeded with the aid of the team's official leader, Minato Namikaze, although it did cost the life of Obito Uchiha.