If you loved Detective Conan: Black Iron Submarine, try Detective Conan: The Darkest Nightmare
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.
You already loved

Detective Conan: Black Iron Submarine
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Detective Conan: The Darkest Nightmare
What they share
Theysit in Action / Animation / Crime / Mystery territory. If that's the register that drew you to Detective Conan: Black Iron Submarine, the second film will land in a comparable space — through a different lens.
What Detective Conan: The Darkest Nightmare is
Tokyo nighttime streets, screeching tires, a spy's getaway car. A high-speed chase ensues between the spy and public safety officers. This anime thriller unfolds with Kobun Shizuno's signature action.