Does anyone think there was a reason for not bringing back Sakumo Hatake as an edo resurrection? Perhaps because it would have removed Kakashi from being able to fight with Tobi, as we know he has limited chakra. It would have been very interesting to see Sakumo in action as we have only heard of his abilities. There is a chance he could still play a role with Kakashi and Obito's past as we know he committed suicide while Kakashi was young, but don't know when. This also clearly shaped Kakashi's beliefs, along with the death of Obito.
Thoughts on why Sakumo was left out? It seems unlikely that his DNA could not be gathered.
Thoughts on why Sakumo was left out? It seems unlikely that his DNA could not be gathered.