Spotted by Computerbase.de, it is a sixth-generation Skylake motherboard with the LGA1151 socket from ASRock. It is not headed for the consumer market but the industrial/embedded segment, so they probably thought no one would notice.

From the images, it can be seen that the motherboard features two DDR3L-1600 SO-DIMM slots that can accommodate a total of 16GB memory.

The feature highlights the fact that OEMs can select either DDR3 or DDR4 with Skylake. The motherboard leak shows one PCIe 3.0 x4 slot, one miniPCIe port, two SATA 6Gb/s connectors and one mSATA port.

Missing is an M.2 port, but that is to be expected on this board as they don't really need SSDs and ASRock opting to drop the port. Also seen on the board are three HDMI ports, four USB 3.0 ports along with two Ethernet ports.

Another leak of a roadmap from mainboard vendor DFI show 17 chipsets targeted at workstation, desktop and mobile categories.

This suggests C236 as being targeted for workstations, with Q170 and H110 dubbed as chipsets for desktops. The TDP for desktops is given as 35, 65 and 95W, with the last number slightly higher than Haswell's 88W TDP maximum. For mobile, the TDP is listed in between 15 to 45W. 

Broadwell is supposed to be heading to the desktop in Q2 2015 but given it is Duke Nukem history we are not holding our breath.