How many parks are there?
Crichton's original Westworld had two other worlds (Roman World and Medieval World) guests and techs could access. A sequel also introduced Spa World and Future World, yet more locations inspired by old Hollywood genre fantasies. Fans who suspected Westworld co-creator Jonathan Nolan was being cheeky at New York Comic Con when, back in October, he said "no" to the existence of Roman World and Medieval World -- but didn't outright say no to the existence of additions like Samurai World -- must feel vindicated for reading between the lines.
The question now: are there even more parks? How many? Samurai World likely won't just be one of two. In Episode 8, Teddy asked the Man in Black to explain who he was, noting, "You speak like you own this world." To which Ed Harris's character replied: "Not just this one. You want to know who I am? Who I really am? I'm a god, a titan of industry."
Was this the Delos chief hinting that he made a business out of Ford's dreams, exploiting the vision of a luxury theme park and turning it into a Disneyland-like network of mini-parks? Or is that idea in development, part of Delos' multi-pronged plan to expand after Ford's ouster? Whatever the case there, Felix's note to Maeve, which held the coordinates for her daughter, at least cemented the fact that Westworld isn't alone (see above). Using a number system for only one park? Unnecessary and crazy.