What happened to Adria after she released Diablo from Leah ? Is she still alive ?
She's possibly on standby in case D3 will get an expansion or something. Considering that Adria has been quite a valuable servant of Diablo, my guess is that she is very capable of bringing him back to the world of the living again.
What happened to the world without Tyreal? For 20 years he had to 'find his ethereal form' after destroying the world stone. When Auriel is captured the Angels, Tyreal, as well as many Humans in the keep lose their hope for a victory over Diablo and evil. If Tyreal is missing, what kind of things went wrong without Justice being in the world?
Is this wrong? Do the Angelic aspects not affect people with their absence? Without Malthael do we lose wisdom until Tyreal takes over at the end of D3? I know its not all explained but I really thought there could be some cool stories created with this in mind.