Hmmm seems odd that they only recently added Trish Carden to the FW sculpting crew if this is true, as the "Mistress of Monsters" isn't exactly known for making 40k critters. I suppose she could be working on Tyranids but it's not her usual M.O by any means, she's always been a fantasy sculptor.
It's a sad loss either way and like several have said already it could have been avoided if they'd focused their fantasy range a bit differently. Go for providing options for existing GW units or things like Command Packs, Battle Standard Bearers and the like that are always popular, rather than just loads of big monsters. Alternative war machines would be a good way to go also, things like the Squig Gobber, the Land Ship or the Dwarven Axe-Hewer thing (which I know wasn't a FW creation, but a new version of it would be neat).