According to Deadline, writer/director Tony Gilroy has met with or is considering actors such as Jake Gyllenhaal, Tobey Maguire and Josh Hartnett to lead the franchise spinoff.
Garrett Hedlund (Tron: Legacy), Michael Fassbender (X-Men: First Class) and Paul Dano (There Will Be Blood) are also in the running, while lesser-known actors Joel Edgerton, Alex Pettyfer, Michael Pitt, Oscar Isaac, Luke Evans, Taylor Kitsch and Benjamin Walker are said to be contenders for the part.
The Bourne Legacy will not feature Matt Damon's Jason Bourne character, instead showing audiences "the bigger picture, the bigger canvas" surrounding the spy's actions in the previous movies.
"This is not a reboot or a recast or a prequel," Gilroy said last year. "No-one's replacing Matt Damon. There will be a whole new hero, a whole new chapter… this is a stand-alone project."