This image looks like the genuine article somehow or other.

There is a set of 9 fins either side of the structure in the middle of the rear intake, also matching the number on the test car. Below that there is a controllable wing like the Panamera, and the position of panel joints doesn’t conflict with the test car either. The distance between the intake and rear view window is also the same. And what’s more, some of the front also appears in the small rear view mirror as well. In many ways, there’s too much in this image.

However, if this design is based on the new 911 like the recent Panamera, then it seems the recent tradition of connecting both taillights together only on the Carrera 4 will be broken.

I guess the latest rendering made in reference to this leaked image is this one.