Sounds good. Are you aiming for having fun with the traditional tropes or messing around by creating new stuff?
I mean, capoeira, and yeah, I probably just misspelled it, and no, I'm not gonna do a web search to find the correct spelling, anyway, it's the Brazilian martial art that looks like dancing. They say that it was created by slaves who were forbidden to learn how to fight, and that they made it look like dancing in order to fake out their masters.
What if it IS dancing?
But not celebratory dancing. What if it's a corrupted form of an ancient summoning dance? In the old days, when times got bad, the elders would do the dances, and the Fire Gods would come into the world and destroy all who were unworthy. Over time, the true dance was lost, and what remained was only a good martial art that helped people not get hit. They did the dance, seeing the self-defense, remembering that it was used in dire times, but no more.
And now, someone has just found an ancient scroll that has taught him how to perfect his Capoeria, making it an unbeatable fighting style that has a small chance of summoning the Fire Gods each round it is used.
Or, another type of plot. An organized gang has moved into town. They fight with clawed gloves, and their fighting style is bizarre, unorthodox, unintuitive... and unbeatable. No one seems to be able to touch the evil warriors in a straight-up fight, and only the small numbers of the gang have stopped them from taking over the city outright. Only an ancient text (yeah, I have a lot of 'em) provides the PCs with clues. The ancient text starts out seemingly useless, talking about how the ancient martial arts were formed by looking at animals and emulating their movements. And then it names a vile and unholy martial art whose practitioners wear clawed gloves -- "Demon-style Kung Fu".
Do the PCs summon a demon and bargain with it to let it teach them its unholy fighting style, based on movements that no mortal mind could imagine on its own? Or do the PCs try and find a good spirit master and beg him to summon an Angel -- hoping that when next they meet the demon warriors, they can unleash their chi, sprout glowing insubstantial eagle's wings, and open a can of Angel-style Kung Fu whoopass on the villains?
