The game is said to feature the biggest character roster of all time and several new characters have been confirmed and would be revealed soon. While an update is yet to be announced, there is a hope that Sound Four might be one among the new characters in the game.
Last month, a fan posted a question about the inclusion of characters in the official twitter page of "Naruto Shippuden Ultimate Ninja Storm 4." The representative did not give a straight answer to the posted question, but gave a sign of warning that their team is fully aware of the expectations by game lovers and they are working towards satisfying all loyal fans.
Off late, screen shots and off screen game play videos of "Naruto Shippuden Ultimate Ninja Storm 4" have been surfacing online and it features the perfect form Susanoo and Shisui. Both the forms were designed by Masashi Kishimoto entirely for the purpose of game. The screen shots were posted in the official Facebook page of Naruto video games.
"Naruto Shippuden Ultimate Ninja Storm 4" is currently in the developmental stage and will soon be available in PlayStation 4, Xbox One and PC, according to Geek Snack.
The game was announced to be released during the fall of 2015, but now it seems to be changed and the game is expected to be released on February 2016.