In May 2007, prior to the release of Bourne Ultimatum, Matt Damon claimed that he would not be interested in returning for a fourth Bourne film, stating (of his participation in the Bourne franchise): "We have ridden that horse as far as we can. Damon even said in an interview on The Daily Show that director Paul Greengrass joked that a fourth film could be titled "The Bourne Redundancy." Nonetheless, the financial and critical success of Bourne Ultimatum has led to speculation in several magazines and Internet forums that another Bourne film might be produced. On February 22, 2008, Variety reported that a fourth film was indeed in the works, with both Damon and Greengrass on board. This was confirmed on June 25, 2008, by producers Frank Marshall and Pat Crowley in an interview with IESB.net. Marshall said "Hopefully they will finish the script in 2010 and that they will be shooting in the summer of 2011 for a release in 2012 and our favorite anti-hero is apparently headed to South America."
On February 1, 2010, Damon, speaking at the UK premiere of Invictus, revealed that a follow-up to The Bourne Ultimatum was "at least five years away". Greengrass, also at the premiere, re-stated that he would not be part of any further Bourne films "unless the right script came along". However, Damon revealed that in the meantime there may be a Bourne "prequel of some kind, with another actor and another director". Matt Damon reconfirmed this on a March 10, 2010 appearance of Today and that he would only be involved if Greengrass was directing.
In June, 2010, it was announced that Tony Gilroy will be writing The Bourne Legacy and it will have a 2012 release date. In October, 2010, it was announced that Tony Gilroy will also be directing.On October 11, 2010, Gilroy confirmed that Damon would not return, that there would be a whole new hero.
Nooo! They can't do one without Matt! He's like, the perfect actor for the role! :(