His miming of using the toilet was apparently meant to show the tension of the upcoming blockbuster.
While not explicitly referencing the wild theory about Ant-Man, Brolin takes the time to get real punny about Endgame’s imminent arrival in theaters.
Josh Brolin’s video comes from his personal Instagram, and shows that the actor is definitely aware of what the internet says about his signature MCU villain.
He also references the marketing “push” ahead of its release.