Ratava, or how the Na'vi landed on Earth

[ZenitYerkes]

Imagine the movie happened something like 20,000 years later:

The Na'vi would have developed themselves, so just imagine that they lost their connection to Eywa and eventually turned up building large metropolis, until they'd reached a similar state to 2154 Earth. In their search for new energies they found a rare deposit of Un'obtaníum on a planet orbiting the Sun called Earth. When they arrive, they find that a strange species of humanoids called Humans live in a Neolithic stage since their civilization collapsed several millenia ago. They're connected to a goddess called Gaia...

...Ratava