So, since Skaven hiding out in sewer tunnels and digging mines under the atlantic isn't really something that would work in 40k, what about them infesting the webway? It would already set them up as enemies of the eldar, especially harlequin, and give them some of the stealth aspect they always had. Instead of tunnel teams, they could have webway teams.


Oh, and how would you translate the warpcannon? I mean, S10 is pretty monstrous in fantasy, but every race has that in 40k.

The bells would be fun too. Gigantic psionic artefacts that destroy morale. Useless against space marines, though.