This blog contains stuff from the game.
U HAVE BEEN WARNED.
1) Archangel Tyrael becomes a mortal, resembling the Palladin from Diablo 2
2) Deckrd Cain dies after the First Act
3) Leah ends up becoming the host of Diablo, subseqently becoming the demon herself after the Black Soulstone is used on her by Adria.
4) Imperius starts having a mental breakdown after his boyfriend-I MEAN BEST FRIEND Tyrael chooses to become a mortal. He then proceeds to go all so melotraumatic (yes a new word) when Diablo pretty much takes over the High Heavens for a short while.
5) Diablo had been making plans to absorb all 7 Great Evils within him to become the singular prime Evil even before
the Dark Exile.
more to come...