It looks like
Green Lantern and Jonah Hex, as well as some other WB properties, have gotten release dates. GL is scheduled for Dec 17th, 2010 and Jonah Hex for August 6th, 2010. Here's the run down of the next couple of years of "superhero/fantasy/blockbuster" movies from Marvel and WB (DC), as laid out by Newsarama:
Iron Man 2: May 7th, 2010
Twilight: Eclipse: June 30th, 2010
Thor, Inception: July 16th, 2010
Jonah Hex: August 6th, 2010
Green Lantern: December 17th, 2010
The First Avenger: Captain America: May 6th, 2011
Harry Potter and the Deathly Hallows 2 and The Avengers: July 15th, 2011
It looks like someone is going to have to blink on those July 15th, 2011 and perhaps July 16th 2010 dates. I just don't see Avengers and Harry Potter opening on the same day. Nice to see another DC superhero get a release date, for awhile it sounded like it would be only Batman for a bit. It could be a heck of a couple years of movies, if they are done well.