I really hope there will be an expansion, and there are plenty of possibilites.
Seeing in the end cinematic that the black soulstone wasn't actually destroyed, it's very possible for the prime evils to come back. I'm thinking that even if it was destroyed the souls wouldn't be destoryed as was told by Adrai, for two reasons:
-Why woudln't they have destroyed the soulstone that baal was in when they imprisoned him?
-Why would Adria tell us something that could ruin her plans?
Also, because Adria escaped after she used Leah (poor leah) as a sacrifice for Diablo, she will probably try to get the black soulstone and ressurect Diablo (and possibly other prime evils) again.
Yeah, I think Imperius is going to fall and be the major villian. He's probably still pissed as hell that a mere mortal saved Heaven, and probably won't take very well to Tyrael being in the council as a mortal either. It just seems to me that Blizzard spent decent time developing Imperius as someone who disagreed with the council, and has the potential to fall.
I imagine we'll see Adria again also, but she doesn't seem like a good major villain.
Of course there will be expansion. Blizzard says that teher will come out more then 1 expansion and also Diablo 3 will be the last diablo.
And I really, really, really haope to defeat Adria in next expansion. Also I wanna see Baal, Mefisto and Lazarus again. :Thumbs Up:
Valors turns to Wrath... I don't think his wrath nearly scratched the surface of potential yet in this game. I see it happening in an expansion too. I kinda don't want to fight him, because his fight with Diablo was so badass and I'd love to see more of that.