There is an interview with George Eads, CSI’s Nick Stokes and JLU’s Captain Atom, on the IN7Q.net website. He mainly talks about his CSI work, but there are a couple of quotes about his JLU work…
He was able to briefly don an altogether different persona, Captain Atom, in the new animated “Justice League Unlimited” series. “That experience would’ve been better if I was Superman! I love animation. I’m an artist; I love doing voice acting like that. I don’t know if I’ll be returning to voice Captain Atom again, but I auditioned for different characters in the [new] “Batman” series.”
When asked if he’s auditioned for any live-action superhero roles, as he has the sculpted looks for it, he quickly replies, “I’m itching to! I would like to do an action movie. In between seasons, I can do that. That’s one of the things I really want to do.”
It’s not that much of a leap to suggest him as a potential Flash – after all Barry Allen was also a police scientist, aka a crime scene invesitgator.