Matt Fraction, Gabriel Ba, and Fabio Moon's Casanova is a stylish adventure about a sexy, amoral, universe-hopping, time-traveling, science-fiction spy caught in a war between militaristic E.M.P.I.R.E. and the decadent and villainous W.A.S.T.E., led by a be-suited and bandaged cackling madman in sunglasses. But beneath its pop surface, Casanova is doing more. It challenges the corporate-driven comic book production model, in which Disney and Time Warner own all the major superheroes. And it critiques the vision of masculinity, limited and damaging, that informs so much of modern superhero...