Following yesterday's 300: Rise of an Empire character poster featuring Lena Headey as Queen Gorgo, Warner Bros. has unleashed a new one-sheet featuring Jack O'Connell as Calisto. Noam Murro directs this follow-up to 2007's 300, which follows General Themistokles (Sullivan Stapleton) as he tries to unite all of Greece in war against the mighty Xerxes (Rodrigo Santoro). Which character to you want do see put on display next from this action-packed adventure?