The relationship between slash fan fiction and comics fandom is problematic not only because of the shift of medium from source text to fan text but also because of the shift of fan community. Comics fandom is often viewed as consisting of heterosexual white men and comics are often explicitly marketed to them, excluding and othering the rest of the audience. Comics fandom online subverts this expectation of audience because the majority of fan authors and creators are women. While canon plots privilege action and conflict, and the problematic depiction of women characters in them is so obvious it hardly need be discussed, comics fan fiction reverses these trends: stories privilege emotional arcs, and female characters are depicted as more recognizably human even when they are secondary to the male characters.
Comics fan works thus become completely transformative because of the shift in both fan space and fan audience: texts that are homophobic become homophiliac, authors and readers who are male become female, and that which had previously been other becomes the new norm. For these reasons, the fans are not just aware but indeed hyperaware of their own identity as subaltern and subversive practitioners.
Hmm… I have such mixed feelings about the idea that any area of fandom is “completely transformative.” I don’t think any area of fan culture can fully transform and escape from problematic texts. Fans often carry the problems of the source texts with them into fan work. Sometimes they make efforts to address issues and sometimes they don’t.