Pacific Rim will go up against Grown Ups 2 on July 12, 2013. If it would have stayed in the May 10 release slot, it would have been sandwiched between two highly-anticipated sequels, Iron Man 3 on May 3 and Star Trek 2 on May 17.
300: Battle of Artemisia goes up against the sequels Red 2 and The Smurfs 2.
Pacific Rim was released July 12th, 2013 and stars Charlie Hunnam, Diego Klattenhoff, Idris Elba, Rinko Kikuchi, Charlie Day, Burn Gorman, Max Martini, Robert Kazinsky. The film is directed by Guillermo del Toro.
300: Rise of an Empire was released March 7th, 2014 and stars Sullivan Stapleton, Eva Green, Lena Headey, Hans Matheson, Callan Mulvey, David Wenham, Rodrigo Santoro, Jack O'Connell. The film is directed by Noam Murro.