Oh good point, but do you think that knowing Orochimaru is a sneaky little bastard that his remains will somehow have some orochimaru lif in them, its like just how his DNA is strong enough to change Kabuto's appearance so drastically and gave Kabuto all of his snake techniques
-Well all I think is that the DNA from Oro acts the same as the DNA from the 1st Hokage.
-The 1st Hokage's DNA is in Yamato, Zetsu, Danzo and Madara and changed two of the fours appearance a little. But in no way has the 1st been able to come back through those bodies.
-Just like that Oro's DNA is inside Kabuto and Anko. All it does is ups their abilities in their techs and the power. Nothing else could possibly happen. Once they die their would be nothing left, no return of Oro.
-Both Oro and the 1st have been sealed in a powerful tech, there is no return for them unless Kishi brings them back in some weird way.
-Plus if Oro comes back what would he do? Right now he is totally out classed by other ninjas that there wouldn't be anything to do.