I still think it's going to be a 2015 model. When did we start seeing BRZ/FR-S mules? Like 2 years prior to their release. This is obviously a mule since it's a complete chop job. You also have to consider that the first concept was only revealed a few months prior and nobody picked up on it. You also have to consider that they have to be running behind schedule because of the earthquake last year.
This car here is probably just an early mule with regular Impreza cladding on it because they haven't finalized anything. There were a whole slew of mules for the BRZ/FR-S and I'm sure this is just the first one that we've seen which means that they've still got to test it a bit more before they release it to the public.