I have a feeling that inarius will be rebirthed as a new incarnation of hatred that we potentially saw in those flashes after the credits. Between him and Lilith he was the one who had true hatred for sanctuary whereas Lilith only had (maybe) love of some sort and only seemed to hate the eternal conflict. Also in the prophecy Lilith is also explained to be pierced by a spear of light well, you can take that very literally as the spear inarius held or (as he belonged in hell and the spear was held with greed/hatred more of a darkness spear if you will) she is to be reincarnated in heaven as an archangel of some sort. Just my thoughts I think it would have very cool implications if they swapped places in the eternal conflict.
Well, I know that Diablo games are full of revives, but it happens between each games, as the hero usually kills all the lesser and prime evils. So, I believe, that Lilith and Inarius are not going to be revived and this is the end of their story (at least until some next game). There will definitely be some clarification of the legend, as Inarius is obviously the Hatred which was pierced by a spear of light and he who was bound in chains was set free is Mephisto.
But there are others to be revived, because this can’t be a full game named Diablo without a Diablo himself, so … I think Blizzard is going to replay the story of D2’s Dark Wandered mixing with D3’s Leah, as Neyrelle is going to be corrupted by Mephisto in a similar way as was the original Dark Wanderer corrupted by the soulstone. So, we will go in her steps, shouting “where is Neyrelle?” and find out that Diablo, Ball (?), Malthael (?) and some others are revived by Neyrelle, while Neyrelle’s view of the world changes and becomes an enemy too.
Aside from the Sanctuary world, I am also missing two big areas - hell and heaven (what happened to Tyrael btw?), so I am looking forward to see more of everything.
Knowing, they plan at least 2 big DLCs, I am expecting (the final boss) Diablo will be in the last DLC.
edit: styling