Its a new IP in name only, its a bread and butter Souls game. Its not some unproved "new IP" like, say, Splatoon which is an untested idea. Everyone knows exactly what they were getting. I'd more call it a spin-off of a known IP.
I'm more just being pedantic with definitions, you don't need to listen to me about that specific part.
So would that mean Battlefield and Call of Duty are the same IP as well, or are they simply in the same genre?