Spamalot and The Light in the Piazza were the big winners at Sunday’s 59th annual Tony Awards. Any early favorites for next year? The next big thing in theater, the musical version of “The Lord of the Rings,” is scheduled for its world premiere in 2006 in Toronto. Previews won’t begin until Feb. 2 and the show has yet to be cast but producer Kevin Wallace offered a preview Thursday night to tour operators and other invited guests at the Renaissance Center. Emphasizing “LOTR’s” human aspects before he mentioned its special effects, Wallace called the show “as powerful and emotional a story as you’ve ever experienced in the theater.” Some particulars: The show will run 3 1/2 hours, including two intermissions; the music is by Indian composer A.R. Rahman (“Bombay Dreams”) and Finnish folk group Varttina, and there will be Hobbits mingling with playgoers before the show. [More]