I am (and have always been) eagerly waiting for this...so will this feature the actual use of characters such as Night Wing and Robin within the actual Arkham City itself instead of just the fighting levels? :)

Sweet, could use some new Batman campaign gameplay! Now to update my Gamefly GameQ!

Nice. Can't wait to play this one, hope it doesnt cost very much...

i still have to get this game,waiting on GOTY edition.

Oh man, so excited. I've been hoping for story DLC in Arkham City for a while now, instead of those extra (admittedly boring) challenge maps.

Playable villains is something I've wanted more of since the Joker. I would've loved some Joker story DLC in the first game.

I'm not sure how much of a threat Harley will be if this is indeed single-player content. Throughout the game, but particularly if you continue to play after the story is done, no one takes Harley seriously. Even the Joker's guards bet she'll be dead inside of a week. She's not portrayed as very bright or savage in either game, but particularly Arkham City, where she was largely relegated as a background/joke character.

Heck freakin' yes.

Any Arkham City DLC is welcome! I wonder how they would incorporate Harley Quinn in this DLC, if it is her being teased.

I will pay to play as Harley.  

glad i didnt trade my copy in yet

Perhaps we'll learn how Harley gets tied up in the steel mill.

I still need to get this game, PC or Xbox? PC had been neglected for me for awhile since me3.

I so can't wait for the DLC to become available, wish they can hurry up with it so I can get to play it.

Sweet! Maybe it will have a clue about the next game. Bring on The Red Hood!

This is goign to be awesome!

i'v always liked Harleys signature Hammer. it always reminded me of that pink chick from sonic games.

Sweet, I'll jump on a chance to expand the story aspects of the game! ^^  

I saw the achievements, and sorry to say, it does not appear that Harley Quinn is the playable character. It seems it is a DLC where Harley goes into a revenge fit after the unfortunate ending.(Though it was a great ending...sort of. I liked it, but I would've preferred if it didn't have to be that way)