According to Famitsu, the ex-Capcom employee and creator of Megaman, Keiji Inafune will be heading the Soul Sacrifice project.
Details are light, but the game is being developed by Marvelous AQL. The term “sacrifice” is referring to Magic usage. For example, you can sacrifice certain body parts to summon creatures. Sacrificing your fingers will summon Gleipnir, your eye will summon Gorgon. This is of course for magic that is at a higher level, while lower level magic will require payments such as stones or trees.
I guess that confirms that this game is most definitely not another iteration to the Soul series by FromSoftware.