Michael Keaton returned to the role of Batman in the 2023 film The Flash, fulfilling a long-held wish for fans eager to see him don the iconic Batsuit once more. Actors taking on superhero personas often invest significant effort into physical training, especially for a character as renowned as Batman. However, Keaton shared some insights reflecting on his approach to the character back in 1989.

In contemporary cinema, having an impressive physique has become a common expectation for those portraying comic book characters. This physical readiness allows actors to convincingly tackle demanding stunts. Interestingly, this was not a prevalent norm during earlier filmmaking eras.

Jack Nicholson had a significant influence on Michael Keaton's view of his Batman portrayal. In Tim Burton's Batman, Keaton stepped into the role of the iconic hero while Nicholson took on the villainous role of the Joker. Despite fans questioning Keaton's casting—especially after his memorable performances in other films like Beetlejuice—Burton believed in the transformative potential of the superhero suit.

The Batsuit's expertly designed structure created an illusion of a more muscular frame, largely due to the skills of costume designer Bob Ringwood. This costume set a new standard, becoming the foundation for the superhero outfits we see today. Keaton initially did not grasp the suit's advantages, believing he needed to train at the gym to prepare for the role. Although he did not overhaul his fitness regimen to the extent of some modern actors, he still put in the effort to improve his condition.

During an interview, he reminisced about an instance when he was training by punching a heavy bag, and Nicholson inquired about his workout routine. When Keaton mentioned he was exercising, Nicholson asked him why he was doing it. Keaton candidly admitted, “I didn’t have an answer for him.”

This moment highlighted that Keaton was unaware of why he was pushing himself to get fit for a character that wouldn’t necessarily require any display of physicality. He quickly recognized that the Batsuit itself would handle that aspect, concluding that a smaller, leaner build would be more advantageous, allowing for better movement and comfort within the costume.

In today’s landscape, choosing not to enhance one’s physique for a superhero role could lead to backlash. Take Robert Pattinson, for example, who faced criticism when he quipped about not preparing his body for 2022’s The Batman. In a subsequent interview, he articulated his perspective on the issue. He mentioned that continual workouts could perpetuate negative standards, stating that no one in the 1970s approached the role in such a focused manner on physicality. Even iconic stars like James Dean weren’t known for their athletic builds.

However, his comments led to misunderstandings, prompting him to clarify that he did, in fact, work on his physique for the role, albeit at a more manageable pace due to the pandemic's restrictions. You can now stream Batman on Prime Video.