Yeah, somebody at ASUS is going to have a problem as the leaks just keep on coming.  This round information on the ROG Maximus XII flagship motherboard leaked. 

The information as presented by Videocardz show the flagship ROG Maximus XII, omng others. No less than four motherboards can be added ROG Maximus XII Formula, ROG Maximus XII Extreme, ROG Maximus XII Hero (Wi-Fi) and ROG Maximus XII Apex all have a 16 power stage design. It seems Coffee Lake is going to require some beefy VRM. All motherboards except Hero get fitted a 2.5 Gbe network jack. Formula and Extreme also have 10Gbe networking. The ROG Maximus XII Extreme is the only E-ATX motherboard from the ROG series.

Update: more and more slides are leaking, I'll just add them so you can browse though them.

ASUS ROG Z490 Series Leaks (updated with more boards)