Joe Russo was in attendance at San Diego Comic Con and though there was plenty to talk about with the films presented in Hall H, many reporters inevitably turned the focus to the untitled fourth Avengers film which continues to be described as a culminating event to an unprecedented 22 film run by Marvel Studios.

Initially titled Avengers: Infinity War, Part II, the film was originally supposed to film concurrently with Avengers: Infinity War, Part I. That plan changed, as did the title of the second film, and now that Avengers: Infinity War has mostly wrapped (Russo did say there are some scenes he and his brother, Anthony, will need to wrap up later), it’s time for what sounds like the beginning of the end. Russo revealed that production on the 2019 release is set to start in two weeks.

The film, which we believe will remain Untitled until either the release of Avengers: Infinity War or someone leaks it, will have its own distinct flavor, according to Russo, in order to stand apart from everything that’s come before it:

It’s important for both movies to be distinctly different. It’s important for them to have different tones, and different narratives, and different surprises for the audience. We’ve worked really hard with [writers Christopher Markus and Stephen McFeeley] at ensuring that the films are tonally different and structurally different.

The Russo brothers, along with writers Markus and McFeeley, whose work dates back to Captain America: The First Avenger, have made as big of a footprint in the MCU as anyone not named Kevin Feige. From all the reports we’ve seen, this will be the last rodeo for the directing duo. While we don’t know what to expect, the passion with which Joe Russo has been speaking about it lately makes us feel pretty confident that we’ll be blown away.

Avengers: Infinity War opens May 4, 2018 and Avengers 4 will follow it just one year later on May 3, 2019.