Its being spread around on many sites now, that there may be a new Vendetta model on the horizon, one that comes with a new flying stand that is revealed from pics in the current White Dwarf. Of course these could just be an upgrade kit, or a future re-release of the Valkyrie, even the forgeworld upgrade kit. I will let you decide for yourself on this, but it is logical that something new to include the vendetta model would be coming with an update to the Imperial Guard.
Here is a link to the pictures from White Dwarf issue 7.
When comparing the Forgeworld upgrade kit, that is where my money is on these pics, but time will tell.
here is the valkyrie with a forgeworld upgrade kit to compare to the pics.