Iron Man and Falcon don't like each other since the events of Captain America: Civil War.
But, the two were almost paired up for Avengers: Infinity War.
The revelation comes from screenwriters Stephen McFeely and Christopher Markus.
They disclosed that in early drafts of the film Falcon took the place of Spider-Man.
There was one version where Spider-Man did not go to space, and where Falcon went to space. And it was fun, it was interesting.
Avengers: Infinity War is now playing in theaters.