New heralds for other gods

[Commissar K.]

Yeah enough of it fits and I think that AoS' Bloodbound also gives great hints at what to explore.

Especially for Khorne the weapon forging process is better included for AoS' Bloodbound, with the Skullgrinder being a prime example, wielding an anvil as weapon and all. 
In that same vein we saw a DG tallyman before Nurgle Daemons got one so that's a yes to me.

For Slaanesh I think more akin to the Masque will be included. I actually expect the noise aspect that EC have now to be included in Slaanesh too. A Howling banshee-like Daemonette would make sence to me. While sins are a great concept to include I also believe we might see torture aspects appear in Slaanesh. Domain of Dark Eldar too but it actually makes sence to have this appear cross faction. Plus we have enough cross faction apperances as is. 

Horrors in Tzeentch with more colours would certainly be fitting. But honestly I also think that GW missed a chance to include the Gaunt Summoner for Daemons in 40k. The model looks much more Daemonic as Mortal anyway.