With the upcoming Avengers: Endgame being the three-hour culmination of three phases across 23 films over ten years of Marvel films, it’s no doubt one of the most-anticipated films of all-time (fueled by the film’s early positive reviews on Rotten Tomatoes). So much so that we fully expect the film to shatter box office records and hit an unprecedented $1 billion in it’s first opening weekend. With so much rich history and characters and post-credit scenes to catch up on …