So playing the PS3 version, on the loading sceens sometimes it says something like
"The only moral to wield El'Druin is Jacob Staalek"
This lead me to search for who this was:
Turns out that Jacob got possession of El'Druin in 1285, the same year that D3 takes place in.
But 20 years earlier is when Tyrael destroyed the Worldstone, and supposedly himself in the process.
Question 1: How is Tyrael alive in D3 and how does his fight/argument with Imperius happen after which he becomes moral and falls to sanctuary?
Question 2: When did Tyrael claim ownership of El'Druin again?
Theories and postulations:
When Tyrael destroyed the Worldstone, he destroyed himself too. Somehow (q1) Tyrael came back to "being" and has El'Druin.
Being that he is the proper owner of it, the sword comes back to him?
But somewhere along the line Jacob is the owner of the sword. Could it be that because of Tyrael's transformation into a mortal, the sword is not his property anymore?
Along with this, Tyrael is no longer the Archangel of Justice but has now become the Nephalem of Wisdom (http://diablo.gamepedia.com/Tyrael) and that El'Druin is a part of him:
"El'druin, in a sense, is part of Tyrael himself. It is tied to his being, regardless of what form he takes, whether it be angel or mortal. Even if Tyrael were to somehow become a full fledged human, El'druin would remain tied to him." (http://diablo.wikia.com/wiki/El'druin).
So now that he is no longer "Justice", could that mean that El'Druin does not possess the same properties as before? It's absolute strength as Justice is no longer valid, therefore its not that Malthael was "righteous" in his actions, but that he is more powerful than the sword now, using his own power to escape the harm of a seemingly normal blade??