OK so not a trailer (I will put one up when there is one), but Grady Hendrix of the Variety Asia Online blog (kaiju Shakedown) posted a link to some footage from the movie.
The premise revolves around a hybrid game Muay Thai and basketball, with as you would expect, no holds barred. Sure there a background story about involving revenge etc., but really this is about people getting hit, hard! YAY!
The film is directed by Thanakorn Pongsuwan (Opapatika) and stars Theeradanai Suwannahom (Ahimsa: Stop to Run)