>How much stuff from this movie was real/true?
they're of this planet. ostensibly human. they've been molded for thousands of years into the perfect sociopaths through selective breeding and transgenerational epigenetic trauma. it's not as flashy but it's basic biology and you know... that's a hell of a lot more plausible isn't it.
>What did the underground cities stuff mean?
come on... do people really need their hand held this much?