IC: Into the Badlands
Honestly I probably won't know till I talk to the players, see what they want and expect from the game.
It needs to be something that works well for cinematic martial arts, with bonus for post-apocalypse, sci-fi and survival.
If the players mostly look for narrative, storytelling experience - most likely WuShu Reloaded.
If they expect something more crunchy - perhaps GURPs Lite Martial Arts rules
If players have rulebooks or don't mind learning from fragments of rules I can post - HKAT or QIN possibly
And there will have to be homebrew modifications, for example to account for The Gift (thinking Gift can be version of Chi powers rules, were characters without the Gift will have strict chi powers mostly unavailable)
There are other possibilities (including freeform although that's by far not the 1st choice), and I am open to suggestions