I never really liked DC Comics, but the rumored movies they are set to work on (besides the obvious Batman / Superman franchises) are:
Aquaman
Flash
Green Arrow (which might have Kevin Smith involved as a writer)
Green Lantern
JLA
Jonah Hex
Teen Titans
There is a Wonder Woman one too but it's only animated.
www.comicbookmovie.com should give you tons of info on the topic
