I'm afraid that the sad truth is that we don't really know. When we gathered up the various discontinued ranges that had become redundant at Citadel, we had no idea that anyone would ever attach any great significance to any of them. They were never properly catalogued. We do have over 5,000 old master moulds here at Stoke Hall, but they have never been fully catalogued either.
There will be ten or more items on each master mould, so it is likely that more interesting and/or strange stuff will eventually appear. I know that we have old Rick Priestley odds and ends including some rather worrying sphincter beasts that date back to the Asgard days. Also some tremendously characterful models from Tony Yates.
We will be in a better position to sort through the really old and characterful stuff when all the ranges that were sculpted and cast, but not released during the last decade by the Pinfold/Fletcher team have seen the light of day. There are also SF models by Terrifically Tim Prow that deserve casting up. We have been casting the more obscure models up and putting them on ebay either on Flyte of Fantasy or Casting Room Miniatures.
I'm pretty sure I have one of those sphincter beasts (seriously). So, 5,000 master moulds that haven't been fully catalogued? Very intriguing!
If any more ex-Citadel emerges you can be sure I'll post it here as soon as I hear the news.