I don't think there would be a case study essay cause it's not really 'relevant' to the contemporary economic climate, but then again they haven't asked it in a few years so maybe.
I think they could ask something on the current account surplus and ask you to talk about how that happened and its effects or maybe contrast it to the impact of the CAD on the economy.
I also predict they'll do a question on macroeconomic policy in relation to economic issues. Most likely they'd do economic growth and unemployment since those are very relevant in the COVID climate. Also, to differentiate students, they could even ask a question on the budget to see who is keeping up with the contemporary.
Free trade and protection is also relevant, but I think it was asked last year. I definitely think there will be something from Topic 1 (the global economy) cause it's rarely tested. Even topic 2 isn't tested a lot, especially balance of payments so I'm thinking current account or trade and financial flows.