Robert Downey Jr. would have to study human anatomy and goat anatomy in preparation for his new role. The actor will reportedly star in an untitled John Brinkley biopic in 2020.

Brinkley is a 20th-century scam artist who pretended to be a medical doctor to con his way to fame and fortune. He was also known as the goat gland doctor after he carried out multiple surgeries based on the idea that xenotransplantation of goat testicles into humans could cure male impotence.

In order to bring Brinkley’s character to light, it is highly likely that Downey Jr. would have to research his role. In order for him to stay true to Brinkley’s persona and all the work he has done medically, the actor also needs to familiarize himself with both human and goat anatomies.

One of the things that the “Iron Man” star could do is to buy anatomy books of goats and humans. He might also be forced to work with goats and will most likely have conversations with veterinarians to understand goats in great detail.

In related news, Brinkley’s untitled biopic isn’t the only project that Downey Jr. will star in next year. He is also scheduled to appear in “The Voyage Of Dr. Doolittle,” “All-Star Weekend” and “Sherlock Holmes 3.”

Downey Jr. was last seen on the big screen in “Avengers: Endgame,” where he reprised his role as Iron Man. In the final “Avengers” film, Iron Man passed away after attempting — and succeeding — to get the Infinity Stones from Thanos.

All of the Avengers members mourned Iron Man’s shocking demise. But it was Spider-Man who stole the fans’ hearts. In one of the scenes, Peter Parker (Tom Holland) saw Iron Man fighting for his dear life, and he comforted him. After he tried to save him, Peter broke down in tears because he knew that it was the end for his friend.

During his wake, Tony Stark’s wife and daughter were present. The dad-and-daughter tandem also made a sweet phrase famous in the film. During their sweet moments, they told each other “I love you, 3000.”

Robert Downey Jr. Heather Denno holds her son Jaxon Denno as the two pose with Robert Downey Jr. Jaxon was expecting to meet a fully-suited Iron Man and was disappointed by Downey. Heather Denno