Fantastic news!! Fantastic, in that it's looking less and less likely we'll see a sequel to that bore-fest Superman Returns. There will never, ever, be a take on Superman that can stand alongside the 1978 classic, a movie I cherish dearly.
I've said it before, but the casting was all wrong - even Routh. What's he done in the interim years by way of other movies? Naff all. And don't even get me started on Bosworth.

The look, feel, story... everything was all wrong. Batman's reinvention via Chris Nolan worked, because Tim Burton got it wrong during his tenure on the Bat-films. Nolan fixed those mistakes, giving a thoroughly adult take on the Dark Knight devoid of the gothic/camp, villain show-stealing previous movie versions.
Superman succeeded in an era when that type of blockbuster was new and fresh - immediately post Star Wars. I think we're too jaded and cynical now to accept the Man of Steel on screen with his near invincible powers, to really take him seriously. To bring him to our level, it will take another Luthor plot to expose him to Kryptonite or another ruse to 'humanise' him (ala Superman II). Talk of a Doomsday battle (from Death of a Superman) on screen, will now be far too similar a smack-down, to the recent Hulk movie's rumble-in-the-jungle.
WB & Singer simply screwed up big-time, making creative and casting choices that were way off the mark. WB were suitably reward with poor-box office (though it did make a modest profit) but more importantly, critical and viewer apathy. It was a 'nothing' film, essentially a 3rd rate photocopy of an acknowledged classic of the genre. WB really shouldn't bother - just stick with Smallville (no bright ideas about Welling succeeding Routh, please...) and the various cartoons they have and of course the comics.
Just leave well alone, Superman's time on the big screen has passed. RIP.