It would probably be ideal for that sort of game. Especially a universe without other superheroes where Batman is a bit less invincible. Would probably also work well for a cyberpunk type of game as well, though I'm still holding out hope for Ghosts of Heife.
I've not played them yet, but by my read, it's really good for any sort of action movie, not just "Hong Kong". I've just finished up a batch of CPD cops and I think they'd make a great start for a FoKF warband. As I was digging through my other figures I realized that I've got enough near-future/sci-fi corporate types to make a nice opposing Yakuza force as well.