Well obviously it depends on the question I think, but in any essay at some point you will have to dicuss its postmodern provisional quality, that makes it equaly a film about film making. You could talk about how Welles is sort of a modernist, dealing with a postmodern medium in film, and therefore ultimatley the film eschews closure, ala the return to the No Tresspassing sign.
So in discussing its postmodern quality, that could then open you up to talking about how different readings can result in the text (Marxist & Feminist) because it retains a dialectic rather then didactic quality.
