The original Lucas show went something like this: You went into XS-Tech's (not sure if the name was XS at this point or not, but it was a large, alien coporation) new, underground, bio-research facility. The preshow was going to reuse most, if not all, of the the Mission to Mars Control Room pre-show AA's dressed in clean suits, in what looked like an operating theater as the doctors were hovering over a dead body of...something. After the pre-show you would be ushered into the main theater, seated, and restrained. At this point, the doctors informed you that YOU were the subjects of this experiment! A large, carnivorous, flying, and supposdedly heartless creature was to be teleported into the room and its "feeding patterns" would be studied. Of course, YOU would be the food! Now during the show, the creature realized what was going on, that all of these people in the room with it were there against their will. So in the end, the creature would first kill the main pre-show doctor, and then sacrafice itself to allow all of the Guests to escape.
Yeah, pretty dark.