I was just thinking "Again?!" There has been the Liam Neeson version not too long ago. Yeah, yeah, 1998. But let me tell you something: The Big Lebowski, Armageddon and Saving Private Ryan are from 1998, too. The Matrix, The Phantom Menace and The Green Mile are from 1999. Time passes much slower now.
The 1998 movie was an adaptation of the book. This one is an adaptation of the musical. People are going to see this one just as much for the songs as the story (as evidenced by concern over Swift's ability to perform On My Own).
Also, Carter as Mme. Thenardier is immediately easy to picture, great casting. The rest of the big names included should make this one quite the event when it comes out.