Godzilla-King Kong combo stomped on expectations as “Godzilla x Kong: The New Empire” roared to an $80 million opening on 3,861 North American screens, according to Sunday studio estimates.The monster mash-up from Warner Bros. and Legendary Pictures starring Rebecca Hall and Brian Tyree Henry brought the second-highest opening in what has been a robust year, falling just short of the the $81.5 million debut of “Dune: Part 2.”Projections had put the the opening weekend of “Godzilla x Kong: Frozen Empire” at closer to $50 million.Last week’s No.