I've always wondered what she intended to say. Does anyone have any theories? I really don't. Anything that follows "somewhere" would sound a little inter-dimensional and not really of the decidedly grounded feeling of the trilogy
I don't know. Although script excerpts I found online, plus transcripts and the subtitles, indicate "Somewhere-" is Rachel's last word, that doesn't make any sense in context. The previous moments have her figuring out that she's not coming through this, so you'd think she'd just hit one very clear message and none of the ones I can think of (she loves Harvey, she knows Bruce is Batman, she believes in Gotham, she has no regrets, etc.) would logically start with "Somewhere". Nolan knows.
The best thing I can think of is a reference to heaven, like "Somewhere there's a better place, I'll wait for you, and we'll be together without all this darkness"
Yeah, it just doesn't seem to me like something Rachel would say. She seems more like the person who would say, "Gotham can be a wonderful place, don't give up on it."