But last week, a deluge of casting news drove anticipation through the roof with the confirmation that both Chris Pratt and Joel Edgerton had joined the project and that Jessica Chastain, Mark Strong and Edgar Ramirez were in talks.
MTV News' Josh Horowitz spoke with Pratt and Chastain on the red carpet for the Critics' Choice Awards about working with Bigelow and the work that goes into preparing for a project like this.
"I'm excited. I'm really excited," said Pratt, who recently made a big splash in his first major dramatic role with "Moneyball." "I'm a huge fan of hers. I think she's the kind of director, she wants you to do something, you say 'yes' and you do it."
With so much secrecy still surrounding the movie, it remains unclear specifically who Pratt and Chastain are playing. Pratt jokingly opened up about his role, a controversial choice by the film's makers. "I play Osama Bin Laden. Yeah. They're going super caucasian, which is an odd choice," he said, but answered seriously next. "I think I'm going to play one of the Navy SEALS."
Chastain was a little less forthcoming about her role but just as good-humored, insisting that no assumptions be made about her taking down Bin Laden. "How do you know I am?" she asked. "How do you know I'm not just one of his wives?"
Both Chastain and Pratt could agree, however, that they have a lot of work ahead of them.
"I'm really happy to be a part of it, a little nervous," Pratt said. "But I'm doing all my research and trying to get myself right for it. I'm just really looking forward to it."
Chastain said that her prep so far had been a lot of "homework." "A lot of reading about something I didn't know about. You know me. I love to prepare," she said.
Are you looking forward to "Kill Bin Laden"? Let us know in the comments below and on Twitter!