Brandimensions, a firm that tries to eyeball movie sentiments of the 25 to 49 year-old demo by examining internet commentary and chat rooms, is saying that the early summer’s big four — X-Men 3: The Last Stand , Mission: Impossible III, The Da Vinci Code and Poseidon — are benefitting from good buzz and are will almost certainly be gretted with vigorous ticket sales. This is…oh, I’d say somewhere between 50% and 75% accurate prediction, but why quibble over fractions? If NRG tracking is wrong and Wolfgang Petersen’s Posedion makes out despite all the dire predctions, fine. I’ll be glad to see it happen.