During the same press conference at which Zack Snyder shot down rumors of a Watchmen sequel, the director was far more open to a follow-up to 300.
As reported by IESB, Snyder has spoken with Frank Miller, who will be writing and drawing the graphic novel on which the second film will be based. Only when Miller is finished with his work will he and Snyder focus on a script for a 300 sequel.
Which wll actually be a 300 prequel.
Snyder said the movie will take place between the Battle of Thermopylae and the Battle of Plataea, the battle that narrator Dilios is at while re-telling the story of King Leonidas and the mighty Spartans to a new group of warriors at the end of 300.