“Spider-Man: Brand New Day” remained the No. 1 movie in theaters over the weekend, becoming just the second film this decade to top the box office for six straight weeks. The last release to enjoy such a long stretch leading the box office was 2022’s “Avatar: The Way of Water.” “Brand New Day,” the fourth standalone Spider-Man starring Tom Holland, collected $18 million over the weekend, according to studio estimates Sunday. Universal Pictures’ “The Odyssey,” as it has for much of the “Spider-Man” run, remained in second place. Christopher Nolan’s epic added $13 million. Both blockbusters helped lead Hollywood to its best summer since before the pandemic.