Zeppelin? Could be hard due to the hydrogen or Nitrogen, but I don't see why not. I read somewhere that Bay wants an aircraft carrier character in the sequel. If he doesn't use Tidal Wave, the Decepticon from "Armada" as that character, I'm going to be greatly disappointed. I mean, with a name like Tidal Wave, I don't think there's a more suitable Cybertonian; plus, he's huge, too, which just adds to the perfection.