The Dark Knight More on the return of Rachel Dawes

[Nightwing 52]

I don't think that would work, honestly. Even if he were to ask, Rachel wouldn't say yes. She knows perfectly well why she can't be with him, or vice versa, so accepting to marry him after giving a speech about 'You're not the man I loved, He never came back, maybe when the world is safe and you don't have to be Batman anymore, I'll see him in you again.' seems a little out of character from who she was in Begins.

Unless she's just one of those women who can't make up her mind.

Rachel: "I want Bruce. No, I want Batman. I want neither. I want them both! God, somebody shoot me already! I can't decide!"

Joker: "If you insist. "

*BLAM*

Dr. Chase Meridian in Batman Forever was a lot like that, she was torn between both Batman and Bruce Wayne during most of the entire film. When she was with him as Bruce Wayne, she'd say she was in love with someone else. And then when she didn't know he was secretly Batman, she'd say she met someone who of course was Bruce Wayne. He was happy with the second decision.