I'm not surprised either. I watched all seasons of the X-Files, Lone Gunmen, and saw the original film. I'm exactly the target audience they ought to have been trying to reach. And when I saw the trailer, my reaction was (after the initial surprise at Carter's franchise necromancy): "Damn, this looks boring." If you're going to have an X-Files feature film, make it about something big. Doesn't have to be conspiracy-related, but it needs to feel like an event, and not just an average episode filmed using a wider lens. If they couldn't get my butt to the theaters, who were they hoping to get?
Fictitiously yours, Trent Roman