

The filmmakers additionally came up with the idea of using time travel as a way to revisit past MCU films and moments, since the entire notion behind Avengers: Endgame was for the film to be a celebration of everything that’s come before. So any sort of clever savings went out the window at that point.” Chris and Steve, our amazing screenwriters, were still writing Endgame and still finishing Infinity War, and we knew we had to shoot them one right after another.

A few months before we started filming we knew we weren’t gonna be able to do that because we were still writing Endgame. “Initially, we thought there’d be great savings-which on a movie of this size is relative-shooting them at the same time, and we’d be able to do what’s called crossboarding where we shoot all the scenes in Avengers Compound all at the same time, all the Infinity War scenes all the Endgame scenes, and then strike that set and move on. Figuring out how to then follow that up became a bit of a roadblock, and is one of the reasons the filmmakers abandoned their plans to crossboard Infinity War and Endgame and shoot them at the same time-the script for Endgame simply wasn’t done yet. As the writing got more specific, this would eventually turn into the team writing themselves into a corner, allowing Thanos to win at the end of Infinity War. The quartet began brainstorming while they were all shooting Captain America: Civil War, and after much trial and error, they hit upon the idea of telling Thanos’ story in Infinity War and then refocusing on the original Avengers team heroes in the second film. Joe and Anthony Russo-the filmmakers behind Captain America: The Winter Soldier-were hired to direct both films, while MCU veterans Christopher Markus and Stephen McFeely were hired to write them.
