One of the original Avengers is officially walking away from a billion dollar franchise. In 2011, Jeremy Renner made his Marvel Cinematic Universe debut in Thor before making a fully credited appearance in Joss Whedons The Avengers in 2012. As Clint Barton, AKA Hawkeye, the Academy Award nominated star went on to appear in many other MCU entries, including Avengers: Age of Ultron 2015, Captain...