Once upon a time, movies were often based on original stories, or on books that people thought were pretty good. And then, movies started to appear that were based on theme-park rides (“Pirates of the Caribbean”), board games (“Clue”), pregnancy how-to manuals (“What to Expect When You’re Expecting”), and now . . . websites. News comes today that 20th Century Fox, in a very 21st century move, has acquired movie rights to the websites The Knot (a wedding-planning site, with pictures of pretty dresses, ads for fancy invitations, and a section mysteriously called “Wedspiration”), The Bump (pregnancy how-to, where you can “sign up for personalized newsletters about your baby each week”), and The Nest (from what I can figure, how-to-be-a-cutely-newly-married-couple). I’m sure all of these are quite useful for their intended audiences, but . . . movies? Really? Can’t screenwriters just think up ideas about weddings, babies and newlyweds? It’s not like these are novel concepts. Ah well. By the way, “The Lego Movie” opens in theaters in February 2014.