Do you think we will learn more about the nature of the soul in the TES universe during our travels in the Soul Cairn? It's one area of the lore that I don't think there is a lot known, other than the Dreamsleeve being some sort of recycling centre for soul energy, Daedric Princes owning souls of their followers, souls fueling enchantment, souls being black or white, and all good Nords go to Sovngard. Not really much about what the soul is as much as what happens to it. Do you think we'll get a more clear picture as to what it is? Or is it really just their identity relased from its mortal form?

Most likely we will since there are side quest.

The soul cairn is where souls not claimed by daedra go. The souls are controlled by the Ideal Masters who believe they are saving them. The souls there are forced to guard the realm forever, hence all the wraith guard enemies etc. Basically it is full of souls saved from the eternal underneath who have been driven mad.

The thing about the Soul Cairn is that it's not ruled by any prince. It's very unique in that sense.

Again, these are things that HAPPEN to the soul, not what the soul IS or its properties beyond the rather strangeling selective black-or-white thing. I would also like to see if any new information could shed light on the questionable ethics of Soul-Trapping of souls, black and white.