Despite the triumphant return of Tom Selleck’s hallowed mustachio– which incidentally, has been missing from theaters far too long– and Katherine Heigl’s chest, Trailer Tuesday presents to you a movie that looks so lifeless, it doesn’t have a poster yet: Killers. I’ll come to an understanding of the metaphysical laws of dark energy before ever I fathom Katherine Heigl’s appeal. Seriously. Since Knocked Up, the lady’s screen presence is so blase and nondescript as to being completely replaceable via any …