If you loved Planet Dune, try Shark Side of the Moon
A bridge between a film you've already seen and one most people haven't. Here's what they share, and what the second one does that the first one doesn't.
What they share
Both films are directed by Glenn Campbell, Tammy Klein, and they sit in Horror / Science Fiction territory. If that's the register that drew you to Planet Dune, the second film will land in a comparable space — through a different lens.
What Shark Side of the Moon is
Moonlit ocean sounds, lunar module wreckage. Astronauts face genetically modified sharks. A classic B-movie horror setup.

