Today we have some of the initial rules leaks dropping from this weekend's upcoming Khorne Daemonkin Codex. Namely, we have a series of pictures from the Appendix including army wide rules like the Warlord Traits and Blood Tithe, as well as the Artifacts, one of which summons a Bloodthirster when the bearer dies! Check it out:
First thoughts - summoning Bloodthirsters is actually really bad - since they have to Deep Strike and thus will be Swooping the turn they arrive. You'll also have a desire for wingless Daemon Princes again.