What’s more troubling in this trailer for Main Street: Orlando Bloom’s feeble mustache or Colin Firth’s Southern accent? Neither is particularly credible, nor are warehouse-renting forgetful aunties or the idea that nondescript white trucks are the most ominous of all vehicles. It should be hard to argue with a cast that includes Patricia Clarkson, Colin Firth, Ellen Burstyn, Margo Martindale, Isiah Whitlock Jr., and Andrew McCarthy, and yet Main Street looks about as cornballs and predictable as they come. There is one highlight, though, and that’s Clarkson purring “Guuuus.†Guuuuus.