Forum adverts like this one are shown to any user who is not logged in. Join us by filling out a tiny 3 field form and you will get your own, free, dakka user account which gives a good range of benefits to you: No adverts like this in the forums anymore. Times and dates in your local timezone. Full tracking of what you have read so you can skip to your first unread post, easily see what has changed since you last logged in, and easily see what is new at a glance. Email notifications for threads you want to watch closely. Being a part of the oldest wargaming community on the net. If you are already a member then feel free to login now.

Personally I think Zombie Pigmen ought be Eldar- this would require re-voicing them as well, of course. This is because they leave you alone until you attack them, then retaliate with incredible fury.

The Nether could be the Webways, with Nether portals as Webway Gates- Obsidian could become Wraithbone.

Spiders, instead of Tyranids (though that does fit...) could be Screamers of Tzeench (the melta mantas) so that Spider Jockeys are Chaos Marines riding them? Or, if you could get separate textures for when Spider Jockeys spawn, they could be Dark Eldar Hellions.