Director David Leitch told Entertainment Weekly that Gaga was in talks to appear in Bullet Train, but “it really all came down to her schedule with [House of Gucci]. There were short discussions and then, this isn’t going to work because she was preparing for Gucci. They shot right before us and overlapped with us and it really didn’t work.”
Leitch wouldn’t say what role Gaga was supposed to play, but she focused her energy on another action movie project. I’ve always said planes are the bullet trains of the sky.