For the first five days (Aug. 30 – Sep. 3), all 20 films will be shown in the order they were released. The following two days (Sep. 4-5) will be “theme days” centered around origin stories and team-ups. Finally, the event will wrap up on Sep. 6 with encore showings of two of the films, as voted on by fans.
via mashable.com/2018/08/10/marvel-studios-imax-marathon