I was thinking of this same idea for Halloween this year! Obviously I have no problems with the idea.
I was thinking a good route is to take a tomboy-ish female Jack. That way you're making use of your feminine features, but you're still recognizable as the character. Kind of a "less is more" type of thought. Just wanted to share what I was thinking about for the costume. Obviously you'll have your own plans.
Can't wait to see the final product!