This comparative study is popular with teachers and they go well together under the dystopian umbrella stressed in the BOS annotations. Their iconic status is evidenced by the wealth of material available online.
There are many, many excellent clips available for contextualising both texts. Context is pivotal for this module elective but 'intertextuality' is not part of the rubric focus as attested by the BOS. Students need to fully understand war's corrosive impact on social stability, values and zeitgeist. . The following site gives a detailed evaluation of the cinematic style and methods used in 'Metropolis' and is well worth a look;
I am an experienced H.T. English, author and presenter.