Who Hill could be playing remains a mystery -- though the possibility of him taking on a baddie is among the speculation. The 35-year-old actor has reportedly been a top pick among the project's producers for someone in the supporting cast, but nothing is a done deal.
The project is currently on the fast track and could reportedly begin filming at the end of the year or in early 2020.
In a recent interview with Variety, Pattinson opened up about his reaction when reports surfaced this summer that he will be playing the Dark Knight.
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TIFF 2019: Watch Robert Pattinson React to His 'Batman' Nicknames (Exclusive)
"When that thing leaked, I was f**king furious," the 33-year-old actor told the outlet. "Everyone was so upset. Everyone was panicking from my team. I sort of thought that had blown up the whole thing."
"I was like, 'Oh f**k! Does that screw me because they are so intent on secrecy?'" After the leak, Pattinson's The Batman audition was quickly scheduled and he found himself rehearsing "literally in Cannes in my hotel room" while promoting The Lighthouse, before flying to Los Angeles for the audition.
Since he was cast, ET spoke with another actor who has previously donned the cape and cowl, Christian Bale, who offered Pattinson his full endorsement.
"All the best to him! You know, I think he's an absolutely fantastic actor," the Oscar winner said the at the Toronto International Film Festival. "Wonderful choice for Batman!"