It’s fair to assume that when most people think of Marvel movies, they immediately think of the Marvel Cinematic Universe. That certainly stands out as one of the most universally-known aspects of Marvel, with groundbreaking films like The Avengers, Eternals, and Captain Marvel making up the vast MCU landscape. But, of course, the MCU doesn’t even begin to cover every story in the Marvel Comics repertoire, and Marvel movies existed long before Phase One started.
Source：https://www.cbr.com/first-marvel-movie-howard-the-duck/
