Matt Damon said that he would not make another Bourne movie unless Paul Greengrass (Director of the second and third) would direct it. Greengrass turned down the offer from Universal to direct another Bourne movie, therefore, causing Matt Damon not to act. And I mean what a retard because Universal didn't want to do a spin off. They wanted to do another sequel. But for some reason Matt Damon didn't want to return to the series that made him famous over a director. Anyway, universal knew that the series still had potential so they didn't want to throw it all away. They turned to Jermey Renner to play another secret assassin, just like Jason Bourne, but it turned out to be uninteresting and unsatisfying. The story was pointless. It was clever how they intertwined the plot events with those from the Bourne Ultimatum though...
Overall I thought it was clever, but not worthy of the Bourne name