The scriptment (http://www.docstoc.com/docs/14294813/Avatar-Scriptment-by--James-Cameron) is a good companion read for the movie, but I feel that the movie as it is is a superior blend of storytelling, pacing and exposition.
There's no way JC could pull Avatar off according to the original scriptment without making it difficult to follow.
There's no way JC could pull Avatar off according to the original scriptment without making it difficult to follow.