I guess this is WHFB too, but since Chaos Demons are also 40K, I figured I'd leave this here -
Originally Posted by An anonymous source on Faeit 212
I got a good piece of news from a friend who works out of GW in Nottingham, He claims "new GUO coming in a month, maybe 6 weeks. Its a much much bigger model, posed in a similar fashion to the FW one but seems to have Nurglings spread around the base and guts. Theres some head variations too.