Following Viz Media's leak, Jump Magazine has now confirmed that an unmasked version of Obito Uchiha will be playable in Naruto Shippuden: Ultimate Ninja Storm Revolution.
Based on the scan, it's safe to assume that unmasked Obito's moveset won't be the same as masked Obito. In addition to a new moveset, Obito will not only be able to summon and control the Jubbi during awakening state, but also perform a Team Ultimate Jutsu with Madara.
Regarding the game's demo, although an official release date has yet to be announced for North America and Europe, Japan will be receiving the demo on the 2nd of July. Players will be able to join in online battles and chose between 6 different characters.
Naruto Shipuuden: Ultimate Ninja Storm Revolution will be available this September in North America and Europe.