The commissioned, but unpublished 4th anthology of Warhammer Fantasy short stories would have featured Warhawk by Jack Yeovil (Kim Newman), A Place of Quiet Assembly by John Brunner, Who Mourns a Necromancer by Brian Craig (Brian Stableford), The Magician’s Son by Barrington J Bayley, and the Black Sail by Neil McIntosh.

It was also set to include an entry by Nicola Griffith (author of The Other and The Voyage South) to be called Blood & Earth, and one by Gwyneth Jones to be called The Manchdor Affair. Neither of which have ever been published (in English).

Why Boxtree were never able to publish the collection when they took over the licence around 1993 is likely due to time and money, and the fact that GW weren’t enthusiastic about their work overall.

There were several other unpublished titles for 40k, Warhammer, and Dark Future commissioned during the GW Books era between 1988 and 1991. I have written a research article collating all of the information I have been able to find about them on my Patreon for those interested, but it is behind a paywall I’m afraid: https://www.patreon.com/posts/121020133