One of Herzog's Failures
I'm normally an admirer of Herzog's work (if it weren't for the terrible dubbing, "Aguirre" would probably rank as one of my favorite movies). All of his films have their flaws, many of them tend to drag or have obvious plot holes, but most are worth watching.
This one seems to be an exception. Some of the Antarctic submarine footage was interesting, the music added some atmosphere, and Brad Dourif could ham it up and be amusing in moments, but that's about it. That's not enough to make a "science fiction fantasy" work at any level. The worst part of the movie was the interminable stock footage from the space shuttle. Perhaps the film would have worked better as a short, since anything of substance could have been condensed down to a half hour.