Rocklea? I don't think so, but then who has a crystal ball? Rocklea is a strange beast as suburbs go. South-west, not all that far from CBD (maybe 8-10k) and relatively close to some blue ribbon suburbs like Graceville etc.
BUT it is quite industrial. There are huge wholesalers fruit and vegetable markets out there (the famous rocklea markets) and a reasonably amount of industry.
You might find reasonably priced property with a good yield but I think it would be a long wait for substantial growth.
Maybe a wrappers' paradise???
BUT that's just my opinion and you MUST do your own research.