This was a cool moment in the new Avengers trailer, Hawkeye appears to have embraced his dark side and become Ronin. I’m assuming that his family were dusted in the snap.
In the comic books this happens after Civil War, it’s a samurai term and generally means going at it alone. Looks like he’s after a particular person or group in the trailer.
He does go back to Hawkeye in the comic books but it’ll be interesting to see where it takes him in the movies and his relationship with black widow.