ok brainstorming
ground rules: fancy dress should make you look good; and should not be too clever as you then spend all night explaining it to not-well-hidden yawns (or is that just me)
black bob; cleopatra; so, Asp Woman who fights for truth and justice with the power of snake venom? Wig, fake snake of some type, white toga, goldy belt, goldy sandals?)
black bob; wonderwoman; let's not go there
black bob; louise brooks; Silent Movie Woman who defeats villains with the power of captions? black and white clothing of vaguely Twenties appearance, dramatic make up, hang caption on cord round neck saying 'Take That You Cad, Silent Movie Woman will never be defeated! Kapow!'