Since Lord Vorun'thul has a siege only champion upgrade, but the Carrion Lancers don't have access to a champion slot it means there must be new Waiqar siege units in the works right? I can't remember if this has been discussed before...

It's been brought up before, and is a logical conclusion. But nobody knows for sure, so the conversation sorry of died there.

It's either harmless future-proofing (an excellent sign) or they have a specific unit in mind (even better).

I think the general consensus was Bone Horrors? I can't quite remember.

Personally I think it would be great if they added in Werewolves, kind of like how you have Ravos and then generic Obscene.

Then again, I double up Rune Wars with D&D and what some high quality Werewolves so my be slightly bias. . .