i wonder if at one point it was demon souls 2 but fromsoft would only stay onboard if they allowed it to distinguish itself from dark souls so that its more mutually beneficial to both parties. from software always kind of felt like Tose developing games for others while never being in the spotlight until their recent success with dark souls.
Seems like a good theory to me. Maybe Sony approached them and pitched Demon Souls 2, From countered with something that would be mutually beneficial to both parties.