According to AAW, all of Razgriz Squadron left the OADF sometime after the war, with Nagase becoming an author and astronaut and Snow working at a sea salvaging company as a submarine driver.

Please refer to the related articles.

Well, would be a nice touch to continuity since it has been 10 years, bois >:)

Wasn't there a scene in the first dlc mission trailer referring to documents and david north saying something like aren't these documents supposed to release this year and the ai thing saying no next year?

Why? As @RazgrizStrigonRot said, the futures of Nagase and Snow are already in Aces At War 2019.