Recently I began my own effort to adapt the series "Avatar: The Last Airbender" into a four-film series, beginning, of course, with Book One.
This will not be like other efforts that attempt to stay as close to the series as possible, however. The object of this project is to take the series' characters, world, and most basic plot and weave it into a cohesive narrative, making for an overall enjoyable film series.
I'll soon begin posting what I have of it.
EDIT: Slightly more readable version (both hastily copied from Microsoft word)
https://docs.google.com/document/d/1F2c-3qPhEFCN_Gxf19rm2uYnWVimh-UvIjOCv5gBE9M/edit