Please don't they need to stay dead :laugh:As for new Nid creatures, you could always try to work Zoats or Genestealer cults back in. I'm not sure what the old official stats for them were, but we could always look up what fluff we can on them and try to figure something out.
Most of my nid stuff has been fulfilled when they got an update but maybe a Special Character Trygon? ((that would be awesome)
also what SM codex are you doing? Vanilla? SW? BA? BT?...all of them?