Superb.
Excelent teaser. Needless to say I will be one of the many of NG viewers waiting for the first episode. The animation was excelent, the violence was graphic and yet not excessive. (For the scene, I mean.)
I don't know who you have line up for her voice, but if she's an excelent voice actor, that will be the icing on the cake. I imagine the story-line will be quite ingenious.
Oh, and your DIRECTING is ELOQUENT!
Now to my mandatory critques:
1. Just a tiny bit more facial emotion from her. I know you were making her look like a badass (sucessful) but even badasses look around with their eyes, press their lips together, grimace, ect.
2. Uh... I guess there was only one.
If you have an allied character to her in the series, I personally would like to see that person in a "I'll team up with you and you're a friend, but most of the time I'm gone" facet. Kinda like thy're both lone-guns.
Anyways, Great Flash! ;)