Yeah, I was really excited about this. Based off my own quote above, I now think that we are a part of the 14th member of the Convocation, and the one who brought Hydaelyn into the world in the first place; together with all the other Warriors of Light in the different Shards. That friend of Emet-Selch we meet in the illusion of Amauret said that we and Ardbert are the same; and that he recognizes us for who we really are, because our eyes (or did I misread aura?) are so unique. I also think that after the last battle, Ardbert merged with us and we became one again, hence Emet-Selch, for a brief moment, seeing his old friend/enemy instead of us.
Now that I think about it... the "product of seven Calamities" part I mentioned in the previous post, could it be that since the Aether of the shards that got absorbed into the Source mixed with the Aether of the Source, that maybe over time, the original soul we were a part of slowly pieced itself back together, one piece at a time? So now, we possess a large part of the original soul again, and maybe future patches/expansions could focus on us gathering the rest to be ready for the final confrontation? That would actually make our fight with the Ascians literally older than history... and I feel that even should I be incorrect about the soul(s), that last part is almost confirmed by this fantastic storyline.