That makes me wonder about what will happen if the RDA returns. The marines on Pandora were there for the sole purpose of protecting the miners. They weren't there to wage war on anyone. Considering how they were made to return to earth, if the RDA returns, they're going to bring more than just an security force. If a simple security team of marines was able to defeat an army of 2000 Na'vi warriors before being overwhelmed by Eywa, imagine what a
real army of marines could do. Eywa wouldn't stand a chance.
The Na'vi would have to advance themselves to survive the second wave, at the cost of future conflicts with themselves, becoming more like human civilizations, or suffer the wrath of the RDA's full capabilities if they
don't advance themselves. Either way, it's a lose-lose situation for Pandora.
That's what I fear.