This is an intriguing piece of science, from Ed Yong in The Atlantic, that started the what-ifs in my head going.
I don’t think it’s enough to be a film, unless it’s some kind of superhero movie. It makes me think Magneto-Spider-Man. What if Magneto was female and has an affair with Spider-Man, and they had a child. It could be the child’s genesis story.
If expanded out I can imagine a world populated by warring clans of superheroes, the magnetics and the spiders. A spider finds love in the arms of a magnetic, Capulet versus Montague style.
Alternatively it would make a great piece on a science programme or one of those Be Amazed style videos.