This is definitely the movie people need to see before they take "Scientology" seriously. This is the future you buy into, folks - a battle between (vaguely African descent) aliens and (mostly white) humans, for an earth that is little more than a wasteland, following a global disaster caused by poor eugenics. Oh, give us a break! The action scenes are just so-so, but everything else about this cheap imitation for a movie is just laughably bad - and that's the only charm in it - it is so bad it is laughable.
The primary source of amusement is the (supposed) "dialog" - I especially like the aliens hissing at each other, it's so, well... meaningless.
The explosions are cool. The prison scenes are stolen from every prison movie of the 1930s. whatever good is to be found here could be found - better - in the old Star Trek TV show. And John Travolta - ! ha ha ha ha ha! Yes, a laugh riot, if you don't take it seriously.