So what happened to the heat over Nacho Libre? Last month I kept hearing that audiences were laughing at the trailer, that it was the summer’s big comedy slam-dunk, etc. I hope I’m not stepping into another Break-Up situation, but recent tracking on Nacho Libre (Paramount, 6.16) indicates a not-that-great opening weekend. Maybe a little more than $20 million, I mean. There’s a chance, in fact, that The Fast and Furious: Tokyo Drift (Universal, 6.16) might ace it out. Another film that’s not looking all that vigorous is The Devil Wears Prada (20th Century Fox, 6.30). Hold on…what happened to the hairdresser bandwagon? I thought every hairdresser in the U.S. and a portion of his/her clientele was going to catch Prada over the 4th of July weekend. Maybe that’ll happen, but the figures say a sizable audience isn’t forming in support of poor Prada as an alternative to Superman Returns. You could argue and say, “Hey, what’s wrong with an opening weekend gross in the mid teens?” Well, there’s nothing “wrong” with it, exactly…