Ezili Danto does make some interesting points. But it is probably prudent to keep in mind that it IS just a movie and that Cameron is making no attempt at historical scholarship. On the other hand One of his characters mentioning "vudon" in this movie will probably do more for the Haitian cause than any number of Op-eds or protests.

Keeping in mind that Cameron is free to do what he wants in a made up world and to base it on any number of sources. The cavalry charge near the end of the movie reminded me of the Poles on horseback fighting the NAZIs at the start of WWII. Unless Cameron says he used it, I don't think any outside scholarship is relevant.