Yes, you can get up to and including 3 pieces to analyse. The Study Design states "Analysing text/s", meaning it could be one or multiple.
Hopefully when you covered Language Analysis, and in the and SAC, you had multiple pieces to analyse. Our issue was on drugs in sport, and for the SAC, we had a seen article (Meaning that we analysed it in class), an unseen article (Never seen before) and a separate visual, totalling 3 pieces to compare and contrast. So hopefully your school did a similar thing to get the practice of it.
It's only happened once in the recent years (In 2011 when VCAA stuffed it up), but don't rule it out that it won't happen again. If you have started doing some Trial Exams, you would have noticed that some have a piece and then have comments from different readers which must also be analysed. If you haven't seen this yet or started doing Trial Exams, then may be find some and practice it.
Rest assured, it is possible to get more than one piece to analyse in our Exam.