In 1999, the New York cast of Reza’s “Art” – Alan Alda, Victor Garber and Alfred Molina – recreated their roles for an L.A. The whole thing seemed a little déja vu-ish to veterans of the local theater scene. It was worth getting there early just to spot Martin Sheen, Tony Shaloub and other familiar faces that turned up to see the original Broadway cast reprise their performances in Yasmina Reza’s Tony-winning comedy of bad manners. “God of Carnage” opened Wednesday at the Ahmanson Theatre surrounded by giddy anticipation and preceded by so many star sightings it felt like an Oscar telecast.