Forget "Spidey." "War Horse" Begins Previews. The Show to See
Beware the Ides of March. For some, maybe. But not all. Certainly for "Spider-Man: Turn Off The Dark," which was to have opened after many delays. It's been delayed again, continuing previews in its current version through mid-April, then closing while the show is being revamped, then reopening in mid-June. But it's still a happy day. A show I feel will be the true sensation of the season, "War Horse," starts preview…