Another playable character is officially in the mix for Naruto to Boruto: Shinobi Striker.
The latest update introduces Hiruzen Sarutobi, who can be used for free or unlocked as a Master Character with the $3.99 Special Master—Ninjutsu Training Vol. 2 DLC.
Naruto to Boruto: Shinobi Striker - PS4/XB1/PC - Third Hokage Sarutobi Free Update