According to Twitch Tony Jaa has retired from films. It remains unclear why he retired but on Friday, May 28 - Jaa rode an elephant to a Buddhist temple in Surin, Thailand, where he shaved his head, took vows, and was officially ordained as a Buddhist monk.
I think after the troubles of making Ong Bak 2 he probably did not have the heart for films anymore, he may make a return to films one day and we still have Ong Bak 3 to look forward too but it could be the last time we see muay thai, elephant riding madness.
Ong Bak 3 Trailer