Associated Press: Turtle power isn’t all that strong the second time around, according to comScore estimates. “Teenage Mutant Ninja Turtles: Out of the Shadows” won the weekend box office, but its estimated $35.3 million debut is not exactly cause for a celebratory pizza party. “Turtles 2” is the latest in a string of underwhelming openings for sequels this summer, including “Neighbors 2: Sorority Rising,” ”Alice Through the Looking Glass,” and even “X-Men: Apocalypse.”