It appears an 'Alternate Earth' costume will be available for Harley Quinn in the upcoming Injustice: Gods Among Us video game. No word yet on how you will access this costume (in game win, DLC, pre-order exclusive?) but as you can see from the in game image above and the concept art below, it is clearly inspired by Harley's Arkham City groove.
I dig it!
And here's a look at her 'standard' Injustice costume concept art, just for kicks.
Bane will also be getting an Alt. Earth costume inspired by Arkham City, but this is Harley Qwednesday not Banerday, so screw him. One can assume more heroes and villains will be getting alternative versions as well.