Well preliminary is going to provide a basis for your HSC knowledge anyway.
But they don't specifically ask for prelim topics.
So as long as you have enough background, you'll be sweet just studying year12 stuff =D
I was actually really happy with the exam, considering the amount of study I put into it.
I did Coleridge and Austen, related texts were Heinrich Heine's poem Auf Flügeln des Gesanges and Jane Eyre the film.
I did 11 pages on essay and 8 on creative, not too bad. Essay question was sooo basic...