Talk about a mystery or stay hush about secret stuff, there were government and semi-government operatives who had an outfit to match their code name.
Fantasy shows its hand wherever there is a shadow organisation or secret weapon not catalogued in our own reality; similar to science fiction.
Action. check. Adventure. check. Drama check.
The spy theme is a good one to have fun with.
Then there's the crime crossover. Horror works well with cloak and dagger. All in the dark together.
My tip for the comic chronicler: write an original spy story i.e. the covert operations and the double agents of yore. I did unearth an interesting history of the Wobblies, if you see the political struggles as part of that wider picture; suspicion and hostility between nations supplanted with class wars at home.
Hot and cold running phone taps spies operate during wars both hot and cold.
Finally a good opportunity for the reader to laugh up their sleeves.