regardless of whether Malthael knew Tyrael was Tyrael, El'druin was still in his hand. he knew it was El'druin, especially since he probably KNEW it would go through him, hence why he walked into it. that being said, when Tyrael said his name, i see that as a, "wtf? Tyrael, that you brah?" who knows, maybe he can't reap the souls of angels and demons. he clearly PWNED the horadrim like they was babycakes. perhaps his goal is to eradicate all life, and release the demons from the soulstone. nephalem are 50/50 angel/demon. to me, it seems nephalem are his goal. the black soulstone takes in both. Nephalem are super powered. would it not be easier to simply erase us, rather than try to kill us?
And, at the End of Days, Wisdom shall be lost
as Justice falls upon the world of men.
Valor shall turn to Wrath
and all Hope will be swallowed by Despair.
Death, at last, shall spread its wings over all
as Fate lies shattered forever.
so this is how i look at it, most of it happened already.
Wisdom shall be lost. Malthael left.
Justice falls. Tyrael = falling star.
Valor turns to wrath. Imperius became wrathful towards Nephalem. (hmmmmmm????)
Hope swallowed by Despair. Auriel = captured by Rakanoth = Lord of Despair
Death spreads wings. Malthael (possibly corrupted? but was he? remember that wrathful guy????) Angel of death.
Fate lies shattered. Itherael... they're coming for him, why? who knows. Imperius seems to be the culprit to me. perhaps he's the reason why Malthael became Death. hence why his endevours seem just. Fate is blind to nephalem.
figure, maybe you'll sacrifice yourself in the end? nephalem alike.
Maybe imperius wants the black soulstone? maybe he knew where it was going to go. maybe he recruited Malthael, maybe that's why hes "corrupt." it seems the idea here is that all angels will fall... Maltheal left, tyrael shed his wings, imperius became wrathful, it appears hope will be all that remains. i'm thinking your goal is to save Itherael..
we won't know til it comes out, and i'm certainly one person that can't wait...