The first draft for both codices Cult Mechanicus and Skitarii are up on the Games Workshop 40k Facebook page for everyone to check out.
here is your chance to get your voice in on the FAQs and to make sure the questions get answered that need to be. This is the first run of codices that are up for FAQs.
https://www.facebook.com/Warhammer-40000-1575682476085719