Despite being an original member of The Avengers, Hawkeye has never had tons to do in the Marvel Cinematic Universe. He was under Loki's mind control for 2/3 of The Avengers and had a glorified cameo in Captain America: Civil War. Avengers: Age of Ultron gave us a taste of Hawkeye's backstory; when the group was on the lamb, he brought them to his rural home where we met his wife (Linda Cardellini) and their three children. At the end of Ultron it seemed that Hawkeye was retiring from the crime fighting business, but then he totally showed up in Civil War to quarrel with Black Widow and make little quips during the airport battle.