It seems that Soul of Cinder may not originally have been the final antagonist in FromSoftware’s Dark Souls 3, with that role seemingly originally meant for Pontiff Sulyvahn.
Lance McDonald, a self-professed “Video Game Engineer for fun”, has been busily working through the game’s code to uncover its secrets, and seems to have uncovered not only a different final boss, but also an entirely different arena for the game’s final battle, with code indicating that the fight was originally meant to take place in an unreleased version of the Untended Graves, as opposed to the Kiln of the First Flame.