People are now getting the Khorne Daemonkin codex, and to be honest, the community has been calling for exactly this for a long time. Of course there are those that wanted more new units, new abilities, but everyone can't be happy. The fact that we got a Chaos God codex is simply amazing.
What it does, is combine both Chaos Daemons (Khorne) with Chaos Space Marines (khorne). Kharn is somehow magically not a part of this, whether by design or mistake we will probably never know.
There are some great things in this book, and I think overall people will settle down with it and really get into the details, and how this book can be combined with the other books for truly something scary.
From various sources here is a listing of what is in the book by Foc. Each entry is complete in the book. I know some people were concerned it would just reference the other codices. Something interesting is that the while the point costs may look slightly different than they are in the other books, they aren't. Simply add the icon or marks of Khorne, and you have point cost for the new book. For example... The Chaos Lord in the CSM codex costs 65pts. Add the mark of khorne for 10pts.... and then you have the new point cost in Codex Khorne Daemonkin.
via anonymous sources on Faeit 212
Bloodthirster of the Unfettered Fury
Wrath of Khorne Bloodthirster
Bloodthirster of the Insensate Rage
Chaos Space Marines
Chaos Land Raider
Lord of War
Lord of Skulls
Battle Brothers: Chaos Daemons, Chaos Space Marines
Allies of Convenience: Necrons, Orks
Desperate Allies: Dark Eldar, Tau Empire
Come the Apocalypse: Armies of the Imperium, Eldar, Harlequins, Tyranids
Here is also some information from Spikey bits from Via Captain Citadel
Similar to the Necron Decurion, the Daemonkin Blood Host Detachment that consists of unique formations from this book.
Every turn players can spend ‘Blood Tithe’ points to get free Daemon Princes, +1 attacks, Feel No Pain, a Bloodthirster, etc.
Codex Daemonkin are Battle Brothers with Chaos Daemons, and Chaos Space Marines, and Allies of Convenience with Necrons and Orks!
Rules for all three new bloodthirsters are in this book.
The Lord of Skulls is available as a Lord of War choice, and it’s profile appears unchanged.
Juggernauts are back as equipment.
Some Daemons saw a drop in points, and various squads are fielded in “eights”.
Daemons included in this book are not subject to instability, and instead are fearless.
There is a axe of that when it’s user dies in battle, a Bloodthirster appears for free.
Another piece of wargear makes psykers take perils on doubles within 24″ of the bearer.