While there has been a lot of speculation as to how much of the Shinobi World War Arc will be included, it seems that Naruto Shippuden: Ultimate Ninja Storm 3 will contain the various Edo Tensei Kages as playable characters. This was revealed in this weeks Shonen Jump, though it really isn’t that surprising with all the rumors of Madara being included too.
Currently Naruto Shippuden: Ultimate Ninja Storm 3 is set to release on March 5th in the US, so hopefully we will see a few more characters introduced before it releases.