a modern, science fiction version of Pocahontas...
...But it's a great movie nontheless!
Person 1: It’s a movie about strangers settling into a “new world”, looking for a rare and valuable mineral. Most settlers don’t care about the well-being of the original inhabitants of the new world and believe they’re all savages. However, one of the settlers, a man, doesn’t agree. He is amazed by the beautiful landscape stretching out in front of him when he arrives and therefore decides to explore it. He meets a beautiful female inhabitant of this world on his way. Even though she mistrusts him at first, they get to know each other better and he finds out that the female inhabitant is a princess (sort of) who’s destined to marry a serious male warrior whom she has no romantic feelings for. She then tells the stranger more about her culture and about how beautiful and important nature is and how it should be respected. They end up falling in love with each other, but the stranger settlers do not agree with their relationship as it will prevent them of accessing to the mineral they came for. The conflict quickly turns into a war between the original inhabitants and the settlers… Guess what movie this is.
Person 2: That’s easy, it’s Pocahontas.
Person 3: No, it’s Avatar!
Person 1: I was thinking about Avatar, but technically, you’re both right!