The Naruto Storm 4 expansion pack, Road to Boruto, adds these two ninja as their own separate characters.
Hokage Naruto and Adult Sasuke were alternate costumes via DLC for The Last Naruto and Sasuke.
Naruto Shippuden: Ultimate Ninja Storm 4: Road to Boruto will make its way to North America, South America, Europe, Middle-East, Africa and across Australasia on February 3, 2017 on PS4, Xbox One, and PC/Steam as a DLC expansion pack and a stand-alone game.
The original Naruto Shippuden: Ultimate Ninja Storm 4 is the final game in the Storm series.