It appears to be real!
Whoa, a new codex is coming this weekend, codex Khorne Daemonkin. I can already see that this might very well lead into the other chaos gods as well, which is something everyone has really been looking forward to for years. This is going to be rather exciting.
This is not really a rumor at this point, as I have many sources sending it to me.
via an anonymous source on Faeit 212
Codex: Khorne Daemonkin
120pg hardback Codex. Rules for fielding a combined force of Khornate Chaos Space Marines with Daemons of Khorne.
Warhammer 40,000 Datacards: Khorne Daemonkin
45 reference cards; 36 tactical objective cards; and 9 large-format ‘Blood for the Blood God’ cards.
Khorne Daemonkin Warband
10 Chaos Space Marines; 5 Possessed Chaos Space Marines; 5 Chaos Terminators; a Chaos Helbrute; 3 Bloodcrushers of Khorne; 12 Khorne Berserkers; and a Resin Herald of Khorne.
Also New Citadel model cases
Skirmish – 100 infatry size case
Battle – 200 infantry case
Crusader – 400 infantry case
This is me right now: