Does this thing have any rules for Chaos Knights?
Though at Fest 1 person on one of the forums reported that they were rather sketchy when talking about possible conversion kits, and no one utterly denied a conversion kit.
HOWEVER the rumour I got as did several others. Was that the new Chaos Codex was likely to be before the middle of next year, and they might have their own thing included in that book, such as a Daemon Engine, or Daemon Knight of some form that will have it's own stuff.
2 of the guys I spoke with also seemed to say that 'in house' they tend to allow Imperial Knights in CSM armies as Battle Brothers because they must still have some.
The knight in that movie also has a great big Eye of Horus on each of his legs, so might be sooner