Im shocked to see that ALL four of the Hokages are back. The way that the series was implying, it seemed as though the resurrection of the First, Second and Fourth to be impossible. Since they are all released out of Shiki Fujin, I wonder just what all their reactions are going to be.
But we cannot assume that these Hokage are going to stick around to aid in the war. Remember, these are Oro's Edo. He has no interest in this war and he would definitely not just let them roam around to get in the way of any ulterior motive. So worst possibility would be that he releases their souls after he is done letting Sasuke hear what he needs to from them.
BUT, if he decides to use these four Hokage then Obito and Madara are in for the worst beating of their lives.
But we cannot assume that these Hokage are going to stick around to aid in the war. Remember, these are Oro's Edo. He has no interest in this war and he would definitely not just let them roam around to get in the way of any ulterior motive. So worst possibility would be that he releases their souls after he is done letting Sasuke hear what he needs to from them.
BUT, if he decides to use these four Hokage then Obito and Madara are in for the worst beating of their lives.