Anything You Can Do I Can Do Better

Gender-Bent AU. "Let's do a head-count here. Your sister, the Demi-Goddess; a super soldier who invented feminism; a living legend who kind of lives up to the legend; a woman with breathtaking anger management issues; a couple of master assassins, and you, madam, you've managed to piss off every single one of them." Starts at Iron Man and continues.