The Marvel Cinematic Universe was launched with “Iron Man” in 2008. There were six entries in each of the first two phases of the MCU and 11 in Phase Three. “Black Widow” kicked off Phase Four in 2021, followed by “Shang-Chi and the Legend of the Ten Rings” and “Eternals” later that same year. Where do all of these place in our list of Marvel Cinematic Universe movies ranked by Rotten Tomatoes? Scroll through the photos below to find out.