As far as MCU villains go, Guardians of the Galaxy’s Ronan the Accuser was one of the more underwhelming of the franchise. When we learned that his younger self would appear in Captain Marvel, the universe had a chance to add depth to his character. However, now that we’ve seen his role in the movie, Lee Pace’s Kree baddie was just as forgettable as ever.
Article source: https://www.cinemablend.com/news/2475071/why-ronan-the-accuser-didnt-appear-earlier-in-captain-marvel-according-to-the-directors