It's a sequel but not as you'd expect one to be.
Baraka was release in '92 and the movie doesn't have a plot like most movies. What you derive from the movie is very subjective, yet the movie itself is objective. It's all about visuals. There is no dialogue, although there is constantly a soundtrack playing, coupling the imagery in both theme and quality.
If you like this, other movies you should see are: The Qatsi Trilogy
We are the Strange (animated, with more of a plot)
Darker side: Philosophy of a Knife (was pretty hard to find when I got it)
Un Chien Andalou (from 1929, pretty influential)
Un Chant d'Amour (not for homophobes, 1950, more of a plot)