Originally Posted by DNA-1842
I suppose they didn't use blood from one of the other seventy-odd superhumans because at that point they only knew about the properties of Khan's blood. There was no guarantee that any of the others shared that trait. They didn't necessarily need Khan, or even need him alive, but he was the only known source of regenerative blood.
If Spock had disintegrated him then the story dictates that one of the other augments possessed the same regenerative properties.
That's fair. I half expect to see Khan in the next film in some sort of status chamber with his blood being harvested as he is pretty much the cure for death in this universe.