Just bought the book and am really looking forward to getting into it, but I'm a bit confused at the lack of antagonists. Perhaps I'm missing something, but are the adventures intended to revolve around humans (such as rival Explorers)? The book provides only a generic eldar, ork, kroot npc and a random warp monster. The starhip section contains an ork ship, a space station and a random pirate vessel. That's not much to challenge exploerers into the unknown!