The video promo sheds light on the story behind the fourth Bourne instalment, with Jeremy Renner taking on the role of CIA operative Aaron Cross.
Rachel Weisz, Edward Norton and Oscar Isaac also feature in the trailer, which shows a still image of Matt Damon's Jason Bourne on a news report and footage of Paddy Considine's journalist Simon Ross from The Bourne Ultimatum.
Damon has stated that he "expects to return" to the Bourne franchise in the future, while Renner has expressed a wish to collaborate with Damon on the next instalment.
A promo picture featuring Weisz and Renner debuted earlier this week.
The Bourne Legacy is released on August 3 in the US and August 13 in the UK.
Watch the teaser trailer for The Bourne Legacy below: