Its 2012, and the very first Avengers franchise film just released in theaters. Marvel fans have finally received the film theyve been wanting for decades. The critics reception of the film was excellent, and the general public knew that a sequel was the natural next step in the world of Marvel superhero films. However, its safe to say that no Marvel fan knew just how hugely oversaturated the Marvel Cinematic Universe (MCU) would become in the ensuing years.