Earlier today, we reported that Marvel's massive blockbuster Captain America: Civil War has become the biggest movie of the year, earning just over $981 million worldwide, passing Disney's Zootopia. Although it still has some work to do to catch Deadpool ($362.5 million) on the domestic side. This superhero adventure kicks off Marvel's Phase 3 lineup, which will culminate with Avengers: Infinity War Part I (May 4, 2018) and Avengers: Infinity War Part II (May 3, 2019). Between now and then, Marvel will release a slew of other movies to round out its Phase 3 lineup, and because of these new movies, writers Christopher Markus and Stephen McFeely recently revealed that their work is far from over on the script, even though they recently turned in their second draft.

Later this year, Phase 3 will continue with Doctor Strange (November 4), followed by Guardians of the Galaxy Vol. 2 (May 5, 2017), Spider-Man: Homecoming (July 7, 2017), Thor Ragnarok (November 3, 2017) and Black Panther (February 16, 2018), before Avengers: Infinity War Part I arrives in May. Marvel will then release Ant-Man and the Wasp (July 6, 2018) and Captain Marvel (March 8, 2019) before Avengers: Infinity War Part II arrives in May 2019. During a recent interview with CinemaBlend, writers Stephen McFeely and Christopher Markus commented on how the scripts are always evolving. Here's what Stephen McFeely had to say about their writing process of connecting these movies together.

RELATED: Infinity War and Avengers: Endgame Get a Stunning Double Feature Fan-Made Poster
"Some of it is informed guesswork. Some of it is constantly pestering people who are making those [other] movies to tell us what they're doing. And sometimes it is us going, 'It would be massively beneficial if this person could be in this place at the end of your movie. I don't care what he does in your movie, but by the end of it."

We have previously reported that production will begin this November on Infinity War, with both movies shooting back-to-back over a massive nine-month shoot. While the writers' second draft may be complete, we don't know how many drafts they'll turn in before shooting, and how many changes the script will undergo throughout that enormous shoot. Here's what Christopher Markus had to say about how they're constantly rewriting.

"And you know, we write it, we assume when we write it and rewrite it and rewrite it, as more information comes in, we will be adjusting. When we're turning in the first draft, it's absolutely that, a first draft, and we'll go through a lot before we get to November."

Directors Anthony Russo and Joe Russo previously teased that this two-part movie will be a "culmination" of the Marvel Cinematic Universe thus far, and that the two-part movie may feature as many as 67 characters. All we know about the story for certain is that Thanos (Josh Brolin) will be the villain, and it is believed that all of the MCU heroes will join in this fight against the villain. Stay tuned for more on Avengers: Infinity War as we get closer to production starting later this year.