If it's crap ... We'll tell you
Source: Vulture, Sky
Update! A rep from Warner Bros. Pictures debunked this rumor and called it "an erroneous error" - Ritchie has not been approached by the studio to direct the film. They would not comment on Snyder's involvement though, so it's possible that it may still be someone else in the director's chair, but for now consider this rumor squashed.... (original story follows)
Reports from Hollywood are saying that '300' Director Zack Snyder has been taken off the sequel - entitled 'Xerxes' - and that Warner Bros. Pictures is currently looking at 'Sherlock Holmes' director Guy Ritchie to take over the film. Warner Bros. has not announced anything officially, but the rumor mill is churning with reasons for the possible change-up.
One popular theory is that WB needs Snyder to focus all his concentration on the upcoming 'Superman: The Man of Steel' - a film that has been briskly hurried towards production after a series of failed starts with other directors. Sources say that the script still has some major problems in the third act (which apparently can't be fixed by having a giant mechanical spider appear), and that if a Superman film isn't in production by 2013, Warner Bros. loses the rights to the franchise and would have to re-license it from the estates of the original creators - Jerry Siegel and Joe Shuster - at a much, much greater cost.
The other theory centers around rumors that a recent screening of Snyder's upcoming film 'Sucker Punch' went horribly, horribly awry. One insider remarked, "it was bad; like, really bad. [WB Execs] are really not happy with it over there". If that's true, then it's possible that Warner Bros. has finally started to see what a lot of internet forums already suspect: that Snyder is a one-trick pony. With both 'Watchmen' and 'The Owls of Ga'Hoole' performing far below studio expectations, the directorial switch may be their way of putting some distance between them and the CG-enthusiastic Snyder.