rumor of Sony releasing a new Zeiss 50mm f/1.4 SSM lens for their full frame SLR's in A-mount. Not much is known beyond this point, but it is definitely plausible.
In fact, it is almost effortless for Zeiss in doing so. All they have to do is provide an optical core unit to be housed inside Sony's fancy SSM electronic housing.
And if this lens is to surface, it for sure will be a Planar.