Stormwatch is composed of characters from the Wildstorm team The Authority. And Martian Manhunter. All I know about it is those 2 dudes are gay and dating.
Frankenstein and Animal Man are the 2 "Dark" titles you should be interested in most. Can't say much about Edge.
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~LtM
http://img202.imageshack.us/img202/1028/ltm.png