By Saturday night, "Black Panther" will likely snag the title of "the highest-grossing superhero movie of all-time" in the U.S. br Reports estimates that the Marvel film will make $630.5 million by the end of the weekend. br If so, it will sail past the previous record-holder The Avengers, which pulled in $623.2 million. br It also trumps Spider-Man and The Dark Knight.br Fun fact: It only took 36 days to complete production on Black Panther.