After releasing his debut album Coming Home this past summer, Leon Bridges returns with a surprising new song today. Titled "So Long," the soulful ballad will be included on the soundtrack of Will Smith's upcoming movie Concussion. The movie tells the story of doctor Bennet Omalu who discovered repeated blows to the head can cause a condition called Chronic Traumatic Encephelopathy (CTE) in football players. Leon's song emphatically reflects the movie's dramatic tone and somber topic. Listen to his new song "So Long" above.