With her shaved head and kick-butt attitude, Charlize Theron dominated the screen as Imperator Furiosa in "Mad Mad: Fury Road," leading a feminist revolt in the relentless chase film.

Now, however, Theron may get only scant screen time -- or won't be back at all -- in the two planned sequels.

"I'm not sure, is the answer," director George Miller tells Digital Spy of Theron's potential return. "She's not in the 'Mad Max' [sequel] story, but in one of the stories there's an interaction between [Max and Furiosa]. I can't really say more than that because it's still in progress."

Watch: Conan O'Brien Channels 'Mad Max' in Epic Comic-Con Arrival

Even before "Fury Road's" release Theron said she had mixed feelings about continuing with the franchise.

"I've got my life and a 3-year-old as well," she told Entertainment Weekly in May. "There's no part of my that's like: 'No f---ing way will I ever do that.' But there is a very realistic part of me that knows this movie was really made on the basis of all the right reasons why George wanted to make this movie -- and Warner Bros. will tell you that. Unless that happens again, I wouldn't trust the process."

Watch Theron talk about her role in the indie pic "Dark Places":