I don't know, give me a minute. Oh....what if Padme lives in secret on Alderann while Bail Organa raises Leia there? Or maybe the memories Leia shares with Luke are NOT of Padme, as we all think? And did Vader ever interact with Leia when she was growing up in the Imperial Senate? These three outrageous ideas should spark more conversation, I predict.
we can only speculate as to how long lucas intends to stretch the timeline in the film..where he will pick up with the story or where he will leave off..its logical to assume that luke and leia will not be in the beginning of the film since vader always knew about his son but never about his daughter..hidden at birth, indicative that anakin had already turned to the darkside..also remember leia said she remembered her mother she "died when i was very young (RotJ)" so im thinking that chances are padme will not die in the film..leia obviously lives with her for a while long enough for her to have memories of her..4? maybe 5 years old? luke disappeared at birth. may the midi chlorians be with you!