The rumours are right it would appear that there is going to be a plastic Valkyrie for the Imperial Guard.
This image is from the Design Studio Open Day which was today. Photo source.
This image is from the Games Workshop newsletter.
Looks very nice, might get one for my Daemonhunters army, well better get painting the rest of it first. What is also nice is that it comes with a decent flying stand which I hope will be available separately so I can put my Ork Bommer on one.