"This is madness!" Noam Murro was heard to shout before being kicked into the giant Warner Brothers pit by a muscular studio executive. "This! Is! 300: Battle of Artemisia!" Said the studio executive.

Artemisia, which is based on the upcoming comic by Frank Miller, author of the original 300 (and a bunch of other cool stuff, like Ronin and The Dark Knight Returns), and will focus on the character of Xerxes (in fact, the movie used to be titled Xerxes), a villain from the first movie. He won't be a villain in this one, though:
"He's a man in search of godhood after the death of his father, battling an Athenian warlord named Themistocles. The story takes place over the course of several years, but the focal point is the battle of Artemisium, which occured in 480 BC."

[post-album postid="205203" item="1"]And good news for all the Zack Snyder fans out there - while he won't be directing this, he did work on the script. So, expect a lot of slow-motion in the dialogue. And Murro, who previously directed the indie drama Smart People (aka "The Exact Opposite of 300"), is said to be directing Artemisia in the same visual style that Snyder used for the first movie. Tonight we dine in Hell, etc. (The Hollywood Reporter)