The Marvel Cinematic Universe has become a well-oiled machine, with every installment in Phase Four releasing to critical and box office success. The Russo Brothers were involved in the franchise starting with Captain America: The Winter Soldier, before taking on the responsibility of its major crossover projects like Avengers: Infinity War and Endgame. The pair have since left the MCU behind them, and Joe Russo explained why actually loves being in the dark about the next slate of stories.