 The first teaser trailer for Monsters University was released on June 20 , 2012 . Four versions of the trailer exist ; in his sleep , Mike mutters excuses to avoid attending class in each one , such as " I 'm not wearing any clothes , " " My homework ate my dog , " " Class President ? " , and " My pony made the Dean 's List . " A second trailer was released on February 11 , 2013 , a third on April 26 , 2013 , and a fourth and final trailer , which included scenes from the film , was released on May 30 , 2013 . 
