WASHINGTON:- As the US kicked back for a long weekend, Disney’s “Black Panther” got off to a superhero start in the North American box office, rocketing to the top spot with estimated earnings of $218 million, data showed Sunday. According to figures from industry tracker Exhibitor Relations, the highly-anticipated 18th entry in the Marvel Cinematic Universe earned $192 million over Friday, Saturday and Sunday — exceeding predictions of $170 million.