Marvel Studios was all-in with their double featured led by the Joe and Anthony Russo, who were fresh off of their success with Captain America: Civil War. At the time, there were rumblings that the films were working with a budget of around $400 million but it was never truly confirmed. Well, that was until now, as Joe Russo revealed during a panel at Sands International Film Festival of St. Andrews that Avengers: Infinity War and its sequel Endgame each cost $500M to make. As such, they had a total budget of a billion making it probably the most expensive productions in Hollywood.
I don’t know if these numbers have ever been accurately reported but in the case of Avengers: Endgame or Infinity War, each of those movies was $500 million plus. So this is an incredible amount of money that is being spent on these films. And you have responsibility, if you have a conscience to in some way deliver a return on that investment for the people that gave you that money. So it is risky to say ‘Hey we got a crazy idea, here’s how we can subvert expectations but we’re going to take your two most popular characters and we’re going to have them try to kill each other.’Joe Russo
It definitely paid off, as not only did Endgame become the highest grossing film for some time before a re-release of Avatar took back the top spot, but we can only imagine how much money they made on home releases, merchandising and more. You have to also respect the fact that the company was willing to risk it. They believed in two directors that had their humble TV roots that would end up developing some iconic entries in one of the largest franchises of the world.