As we know many great ninja’s were brought back to the world of the living during the 4th Great Shinobi war by both Kabuto and Orochimaru, where they were then forced to fight against their will.
However, many legendary ninja’s were for some reason forgotten, and that includes someone who was strong enough to be stronger than all three Legendary Sanin in Sakumo Hatake.
However, this man that we are discussing today is someone who is much lower in rank than the legendary White Fang and father of Kakashi Hatake.
This man is the talentless internal Genin in Might Duy, the father of the famous Jounin in Might Guy.
Yes, this was a man that was never able to even pass the Chunin exams, which might make you wonder why would anyone want to revive him?
Well, let me explain, Might Duy actually achieved something only a small few have been able to do and that was opening all eight inner gates.
In doing so, Duy received the powers beyond that of a Kage and was able to kill four of the seven Legendary Ninja Swordsmen of the Mist at once, so that he could save his son and his son’s friends.
However, when doing so the user dies, just as Might Duy did after the battle with the Legendary Swordsmen.
If Duy was to reanimated then he could have used that eight inner gates, which honestly, is probably why he wasn’t reanimated.
Think about it, the reanimation jutsu doesn’t only bring back legendary ninja’s back from the dead, it also makes them immortal and gives them an unlimited amount of chakra.
Now, imagine if Duy was to be reanimated and was given an unlimited amount of chakra, as well as being unable to die.
If that was to happen then Duy would be able to open all eight inner gates with no consequences at all or even a time limit, and as a result, he would quite literally be unstoppable.
Therefore, it would have been too much to bring him back and that’s why I believe Duy was left dead during the 4th Great Shinobi War.