Supposedly, those are leaked Razorwing Fighters. They're flyers, which in game terms means Fast Skimmers. No transport capacity like a Storm Raven or Valkyrie, but lots of guns/missiles. Just as easy to blow up as a Ravager, though, so not much to worry about after the initial strike.
Overall, I like the sculpts. The Venom is pretty much what I expected, though a little wider than I was hoping. The price is right, though. The Talos/Cronos are nice, but look flimsy and difficult to transport. Typical DE there. The Scourges are excellent sculpts, but are instant broken bits based on those giant tipsy wings and skinny girl legs. Also, the box set is annoying because it only includes one of each heavy weapon choice; this is a problem because the only reason you really want them is for Heat Lances. Meh.