New York — Black Panther scored one of the best second weekends ever with an estimated $108m in ticket sales, putting it on track to rank among the highest-grossing blockbusters ever. Ryan Coogler’s Marvel sensation is on a box-office course that few films have managed, according to studio estimates Sunday. It is only the fourth film to earn $100m in its second weekend, along with Star Wars: The Force Awakens ($149.2m), Jurassic World ($106.6m) and The Avengers ($103.1m).