According to ComicBook.com Kevin Feige loves collaborating on the Marvel Cinematic Universe.
Feige attributes the success of the 20-movie MCU franchise to the collaborative effort of its stable of artists.
Feige revealed the studio tests versions of the movie and makes adjustments right up until the release.
---I don’t think people realize what a collaborative, living, sort of piece of art a film is. Four weeks ago, this movie (Ant-Man and The Wasp) was different.---