Paul Greengrass was just too loyal to his buddy Jason Bourne to direct a Bond movie
Greengrass says he was offered a Bond flick early in the Daniel Craig era, but turned it down because he's a "Bourne guy."
Matt Damon in Jason Bourne, Screenshot: YouTube
The relationship between the James Bond franchise and fellow JB spy series Bourne is a complicated one; it’s not like Robert Ludlum wasn’t familiar with Ian Fleming’s classic character (and the dozens of movies he’s inspired over the decades) when he started writing The Bourne Identity in 1980. It’s also pretty clear that, as the Bond braintrust was cementing Daniel Craig’s more cinematically modern take, circa films like 2008’s Quantum Of Solace, people inside the series were casting at least an eye or two over movies like Paul Greengrass’ The Bourne Supremacy, which injected a jittery, in-the-moment feel to the world of spycraft that Bond could possibly use a dose of.