Speculatison of, what bosses we will meed at Diablo 3 expansion(s).
In fact that Adria get away, so I suppose, that we defeat her at next or after next expansion and sems to me, that there we will meet all old main bosses again, who are not show up yet at D3 (Lazarus, Mefisto and Baal).
I think, Imperius is the last boss at next xpack, because, he kill all New Trstram people, because he thinks, that human race and Teryal is guilty abut what happend on the High Heavens.