here's the preview pic for the anime...

i think this will have a different story because the character designs are different from the original (maybe huke upgraded them...XD)
when i look at BRS's design the Rock Cannon is more badass looking, her jacket now have white lines and she have 2 belts, the white belt is very similar to the new design of BRS huke releases named BRSB (Black Rock Shooter Beast)...i think this will be her upgade form in the anime (can't wait to see her in action...XD).

also DM have eyeglasses? at first i really thought its BDG (Black Demon Girl)...XD