Despite major appearances from Donnie Yen and Michelle Yeoh, the In the Line of Duty series has never received much exposure in the martial arts genre. Beginning in the 1980s, sequels became increasingly common for martial arts movies , with some getting a long list of installments.

Most were admittedly direct-to-video releases, with movies like Jean-Claude Van Damme's Kickboxer getting four sequels just in the 1990s alone, all without its original star. One of the most popular martial arts movie franchises at this time was Jackie Chan's Police Story , which ultimately grew to encompass seven films.

However, it didn't reach that number until 2013. Interestingly, one of the franchises adjacent to Police Story but nowhere close to its level of popularity wound up with just as

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