Avengers: Secret Wars will feature a fan-favorite Stranger Things star. The Marvel Cinematic Universe has had quite a few stacked rosters throughout its long history. When it comes to the MCU's Avengers movies, which have become crossover events for the entire franchise, several of Hollywood's biggest actors and a few rising stars are expected to come together with every installment. Avengers: Doomsday's cast illustrates that, bringing back actors from Fox's original X-Men franchise to stand alo