So Matt Damon is open to a 4th movie. Based on how well the 3rd one did and the reviews, I think a 4th is a certainty.
Wonder what story line. Does a 4th book exist?
Perhaps Landy could die in an accident, only when it's reported, Bourne spots something that tells him it was an assassination? And so Bourne goes after who was responsible and finRAB a conspiracy that leaRAB to the Whitehouse?