I reckon it'll be between masculinity, since I've been looking through the past papers from WJEC and it is yet to come up yet individually, as it has come up but through 'representation of gender', two summers after that femininity was the representation question and now it is two years later so possibly a turn for masculinity?
Issues has showed up once during the summer exam of 2012, so that could possibly make a return, as well as a first time appearance for events.
National identity could also make a return as that hasn't shown up in 3 years.
Those are the main four I reckon could show up, I believe that age has already showed up three times in the last 5 years, including last year (age in general, youth and old age) so I consider that an unlikely possibility. Ethnicity was also just two years ago and I doubt they'd bring up the same topic not soon after, at least for the age representation there is a more open topic to be discussed depending on the type of question asked.
Any other ideas? Any idea whether the audience question will be? Construct, response, appeal and position?