There is nothing wrong with fans of Alien being excited.
:wacko
Burn the witch, burn the witch. Wait, what am I saying? I'm excited about this film! I've even tried contributing to this very forum about how this film could be awesome. The derelict ship, the Nostromo like displays, the alien wall patterns, ect. Where are you getting the idea that I think alien fans shouldn't be excited about Prometheus? It doesn't make sense!
My complaints about this featurette all stems from the simple fact that it doesn't say anything new. We've been getting spoon fed "Ridley is back in science fiction!" since the preview of the first preview four months ago. That was cool. The TED show? Awesome. The new trailers, TV Spots and other online interviews? Perfect. But this? Ridley Scott is awesome and we should trust them on that. We've already given you our trust! What more do you need?
And yes. I trust Ridley Scott with this. I'm going to see this movie on opening night, full 3D price, guns a blazing. If there's anyone involved in this production that I don't trust implicitly, it's Damon "I take back everything I said about the prequel movies!" Lindelof. That guy scares me more then Uwe Boll.