I liked the movie the fifth element because if involved different characters and settings that were not easy to imagine before watching it, like the stones inside the singer or the mutants´ transformations.
What I would include in my story is precisely the fifth element, love. This element proved to be strong enough to save the world and how it depends on two persons, not just one, and how real it has to be in order to prevent ir from been stolen as the other 4 elements.

science fiction: is a genre that includes the mixture of scientific advances that develops a fictional situations because they go farther than we are in reality, but eventhough we are able to believe it

examples: returning to future, war of the worlds, star wars, hulk