It will be tzeentch! Here’s why. In the first end times book there are two demons that play a huge role. A greater demon of nurgle and the changeling. So nurgle and tzeentch!
Agreed. I’m guessing Slaanesh, what with the rumours surrounding cult of Slaanesh dark elves in the next end times book (about time too, I remember trying to model that army back in the 90s, great potential for cross-over stuff, and not just in a transgender way)
Jaded Gamercast 
My guess is we’ll see more of Valkia the Bloody’s invasion of Naggaroth, so probably Khorne.
It will be tzeentch! Here’s why. In the first end times book there are two demons that play a huge role. A greater demon of nurgle and the changeling. So nurgle and tzeentch!
They will do slaanesh and tie it in with the dark elves when they do the civil war.
Agreed. I’m guessing Slaanesh, what with the rumours surrounding cult of Slaanesh dark elves in the next end times book (about time too, I remember trying to model that army back in the 90s, great potential for cross-over stuff, and not just in a transgender way)