Just for full disclosure, I am a huge fan of the orginial movie so.
So why do the designers and people who run the park know about him? They are supposed to know the location of every Host.
Also other than the main premise (robotic sex and violence slaves becoming self aware in a theme park) I don't think it's going to have much in common with Westworld, Futureworld and Beyond Westworld. I don't even know if they're going to have the other "theme parks" as well or if it's just going to be an isolated Westworld.