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Yes, admittedly the entire "avatar" aspect of the movie (humans using a technology to take on a physical manifestation of the aliens) is unique to the story and has no analogous aspect to Disney's Pocahontas.
But the basic plot (invaders from another land who are more technologically advanced than the natives, and the natives who are more primitive & in touch with the natural world, the love story of the outsider with a native, the whole "manifest destiny" attitude of the invaders - especially the main villain - to take the land and claim it as their own while desiring to subjugate or eliminate the natives) is the same as Disney's Pocahontas.
You could probably make this analogy with
Dune too.
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