I think middle ring Brisbane and middle ring Gold Coast (I know it is a smaller city so basically I mean anywhere from say 2km - 10km from Surfer's Central), will do very well in the next 12 months and we might see a couple of postcodes in these locales, eclipse those of sydney...
...however. Sydney overall will win in this same 12 month period. Why? The star performer/niche postcode pockets of SEQ will be dragged down by severe inner CBD oversupply which will likely perform pretty poorly.
The only wildcard that might change this, in the short (12 months) term; would be the Chinese factor. I've heard murmurs that they are warming to Brisbane as an expansion from Sydney/Melbourne focus, but I'm yet to see it in person.
I have a business trip in mid June though. I might stay the weekend and attend a couple of auctions in affluent suburbs and CBD units, for ***** and gigs, just to see if there is any/heavy presence... Might change my views on inner CBD units in Brisbane if the Chinese factor is a major one.