Edward Norton’s The Incredible Hulk does not occupy a proud spot in the Marvel Cinematic Universe. In fact, if/when Marvel winds up doing a Mark Ruffalo solo Hulk movie, Norton’s turn at playing Bruce Banner will definitely be rendered non-canon. Furthermore, when Marvel was assembling its Avengers in 2010, there seemed to be bad blood between the studio and Norton’s camp, with shots fired on both sides. Then we got Mark Ruffalo, and all was wonderful (and always angry) with the world.
At the time, Norton gracefully withdrew from the conversation, saying that he had been blessed to have played one of the Hulk’s many incarnations. In a recent interview to promote his new film Birdman, he added some context that shows just how good he feels about his decision, four years later.