Originally Posted by masterofmystery

Not really. Even though the audience knows that she's been abducted, the trio have no clue, so there's still the element of surprise for them. Who knows, maybe they'll set it up so that by the time the trio get to Xeno's house, they'll think that Luna's still there (and even throwing off the non-book fans into thinking Luna's back)? Many different approaches could be taken there.