I think she will. I know thousands of people disagree with me but I think there is an extremely high chance. Durcan and Yeats came up in 2 mock papers. I think that they'll do something like they did with seamus heaney. I think that they'll make a reading comprehension on one of them or even put one as an unseen poet. My point is that if you are learning the Irish poets do ALL 3. Don't cross Ní Chuilleanain out because she came up last year. Best of luck in your exams.
Your always guaranteed an Irish poet though. And if one does come up as an unseen poet you'll be sorted for that piece too. Just know they're themes and preoccupations as well as they're main techniciques