Back in May, while promoting Captain America: Civil War, directors Antony Russo and Joe Russo revealed that Avengers: Infinity War Part I and Avengers: Infinity War Part II will get new titles. Another report from last month revealed that the first movie had been retitled just Avengers 3. Now it seems that the studio has decided on an official title. Avengers: Infinity War Part 1 has been changed to just Avengers: Infinity War and it will no longer be two movies. Avengers 4 is currently going under the temporary title of Untitled Avengers, with the official title to be determined at a later date.
Deadline reports that, despite the title changes, both movies' release dates of May 4, 2018 and May 3, 2019 remain unchanged. The original titles were first unveiled during a Marvel press event in the fall of 2014, when the studio unveiled their entire Phase 3 slate. However, it seems that both the filmmakers and the studio weren't completely sold on those titles.
While Joe Russo confirmed this past May that the titles would eventually be changed, he also added that they hadn't figured out what to call the movies quite yet. He also clarified that they are both two very different movies, and the Part I and Part II titles are "misleading," since they aren't just two halves of one gigantic movie. Now that the Infinity War title is set, the guessing game shall begin as to what the fourth Avengers movie will be called.
Both Avengers 3 and Avengers 4 are slated to shoot back-to-back starting this November, with a shoot that is expected to last over nine months. Christopher Markus and Stephen McFeely, who wrote all three Captain America movies, wrote the script for both of these new Avengers movies, but no plot details have surfaced yet. We do know that Thanos (Josh Brolin) will be the main villain, presumably as he tries to assemble all of the Infinity Gems for the Infinity Gauntlet.
No cast members have been confirmed yet, but the old and new Avengers are all expected to surface in this adventure. Robert Downey Jr. (Iron Man), Chris Evans (Captain America), Mark Ruffalo (Hulk), Jeremy Renner (Hawkeye), Scarlett Johansson (Black Widow), Elizabeth Olsen (Scarlet Witch), Paul Bettany (Vision), Don Cheadle (War Machine) and more are expected to come together to take on Thanos (Josh Brolin), but the directors have also teased there may be upwards of 67 characters in this movie. With production starting in just a few months we'll have to wait and see what details, if any, Marvel will confirm before shooting starts.