Photo: Vulture; Photos: Marvel/Walt Disney Studios/Everett Collection The Avengers assembling isn’t as exciting as it used to be. For the last 17 years, one of Marvel Studios’ selling points has been its interconnected narratives and major crossovers. But after 14 shows, 37 movies, and the introduction of a “multiverse” — an endless array of alternate timelines (and confusion) — the MCU has become unwieldy at best. The release of The Fantastic Four: First Steps marks the beginning of what