Your first ideas

Women and Film
Your ideas are somewhat too broad but I think you could usefully look at the "virgin/vamp" dochotomy in a range of contemporary films, as a way of testing whether this "regime of representation" of femininity is still confining women's roles in contemporary film. You'd either need to look primarily at popular, big-box office cinema (rather than alternative representions), but my worry is that for every film you pick there might be another wich would undermine your position. It would be better to narrow this by GENRE and only look at contemporary films from a particular genre. Is there a genre you watch a lot of which you could focus on?

Sean