If you loved Detective Conan: The Darkest Nightmare, try Detective Conan: Quarter of Silence
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: The Darkest Nightmare
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Detective Conan: Quarter of Silence
What they share
Both films are directed by Kobun Shizuno, and they sit in Action / Animation / Crime / Mystery territory. If that's the register that drew you to Detective Conan: The Darkest Nightmare, the second film will land in a comparable space — through a different lens.
What Detective Conan: Quarter of Silence is
Snow-clad village streets empty except for a mangled subway car. A tangled web of cause and effect unfolds around Conan. Director Yasuichiro Yamamoto helms this animated mystery.