Earth’s mightiest heroes travelled through time and space to stop Thanos in Avengers: Endgame, but they couldn’t actually save the Marvel Cinematic Universe. Just as the Mad Titan predicted, its rapid expansion turned out to be unsustainable. After years of big spending on TV shows and films yielded only shrinking audiences and mediocre reviews, the franchise effectively collapsed under its own weight. Now Marvel Studios is scrapping and delaying projects as it puzzles out the best way to...