Run Jason Run

Recently saw the third of bourne series( movie), its just fun. In his search for his identity he outsmarts the whole of CIA. David webb is his real name, this was told to him at the end of the second movie.
Some journalist writes about Jason and so is marked by the CIA, jason meet the journalist and warns him, journalist is killed, and we have a Jason on the run again. Its doesn't matter why he is on the run, but he is, thats the heart and soul of the movie. Run Jason Run.
The chase and how he uses his skills to the beat the one who trained him is pure entertainment.
Do we have a fourth movie, may be, its about his past life. The life before amnesia.