The minimalist poster project started out as some requests for a friend's dorm wall. Eventually they were shared on reddit where they grew from 14 to 128 posters. After completing all the requests they were shared as a collection garnering 7 million views in one day.
Sources: http://imgur.com/a/TYfWa#0
http://www.reddit.com/r/pics/comments/ow56a/remember_those_superhero_posters_i_shared_a_few/
http://www.reddit.com/r/pics/comments/m4zka/i_spent_the_past_two_months_working_on_these/
Below I've shared a few of my personal favorites from the project.