http://collider.com/edgar-wright-ant-man-exit-explained/
Sorry for the cherry-picking, but it seems to me Ant-Man's direction was mostly Rudd and McKay after all.
...its funny some people say, Oh theyve been working on it for eight years and that was somewhat true, but in that time I had made three movies so it wasnt like I was working on it full time. But after The Worlds End I did work on it for like a year, I was gonna make the movie. But then I was the writer-director on it and then they wanted to do a draft without me
Marvel regrouped, kept most of Wrights cast, and hired director Peyton Reed to take over with Paul Rudd and Adam McKay rewriting the script
Sorry for the cherry-picking, but it seems to me Ant-Man's direction was mostly Rudd and McKay after all.