Eh the link is nothing new at all and is from Friday 30th August 2013! Been quite a few posts recently on Z4 replacement and the Supra that will also be happening too.
I'm sure over the coming months there will be more chat as designs and concepts make their way into the domain as it's supposedly a 2017 launch.
At least that link has more Z related concept pics. Most links have more Supra ones.