Who are the Dark Avengers?

The Avengers have managed to survive many numerous incarnations. New Avengers, Mighty Avengers, Avengers Assembled, Avengers Disassembled...you get the idea. And now its the Dark Avengers. But who are the Dark Avengers? Marvel has some cryptic clues on their site that could be an indication. "What he does isn't very nice." "Back in black." "Not such a straight arrow." "Men fear a powerful woman." "The greatest hero in the Marvel Universe." I'm guessing we're going to see a Dark Hawkeye, and the back in black is most likely Spider-Man. I'm guessing Wolverine is the one that's not very nice, and greatest hero is possibly Iron Man. Maybe Spider-Woman as the powerful woman? Let the speculation begin, and we'll find out the answers to these characters in Dark Avengers #1 in January 2009. Who are the Dark Avengers?