Board Thread:Lore Discussion/@comment-26054788-20150131032222/@comment-4526779-20151111142203

Beetoff13 wrote: Since being reborn is a common thing in Dark Souls 2 I just assume that it is the Four Kings reborn from Dark Souls 1. The two boss' have a lot in common. A dark figuer that sits alone in the the Abyss, wields Dark magic, is able to make coppies of itself and even the soul itself is one of light.

I think the Darklurker's soul is simply the shard Gwyn gave to the Four Kings that has faltered over the years into a normal boss soul. If it isn't than it would be the only Lord Soul that did not re-apear in Dark Souls 2. I have to agree with this, it makes the most sense to me.