The latest Forge World Openday saw the preview of upcoming Valkyrie and Vulture variant kits for the new GW plastic Valkyrie. Warseer has a number of photos of them and other new upcoming Ork (lots of Battle Wagon variants) and Chaos FW kits. The Valkyrie variant is a gunship called the Vendetta armed with what looks like six lascannons. The Vulture is a major variant with resin fuselage and wing bits to add to the main wings and tail booms of the new plastic kit. A new gatling gun type weapon, the Punisher Cannon, is posssibly included.
All in all some great looking stuff.