well I wouldnt mind working on it, but if this prject should ever be brought to reality, we'll need 3d artworkers, scripters, writers and such.
but still, i think we should keep it on a realistic level, there wouldnt be any point in using several years on this project , so it should probably be somewhat big, but not too overwhelming, we're not planning an entire new game, it should probably be mostly focused on a cool terrain that fits the na'vi race and maybe a few quests, a player-home, 2 new mounts if anybody are willing to make, around 3 new sets of armor, some new weapons, and na'vi as a playable race, and the voiceovering.
that is allready a huge project to start out with. so if anybody are willing to form a team of modders, it could be really cool, and as I said previously, Im willing to join that team aswell:P