hey, I'm new but this post really interested me. Let's see, going back to the whole LDC theory, I recently read I believe in Star Wars Insider that Hayden Christensen signed on to do Episode III as did Natalie Portman renewing her contract she orginally made with Lucas when she signed on for TPM. So that would make, sorry to say, your photo unrealistic of Padme dying.
Next, the whole Luke and Leia rememberance thing. I can hardly remember what I had for breakfast somedays, so I highly doubt most people will remember coming out of the womb during childbirth, let alone the first day of birth with their mother. Also, Leia did mention she was beautiful but sad. Padme might die from loneliness. Her sadness maybe because she knows she had something to do with the Empire's formation, and the fact that she does truely love Anakin. Dying from a broken heart, not to mention stress from blaming oneself for the destruction of thousands of people's lives (Clone Wars).
So here's my theory, Anakin finally turns to the darkside, as everyone on this forum already knew was going to happen. Anakin...and correct me please if this might be wrong....is told Padme is dead. Thus securing the lives of our favorite Jedi Twins. Padme in turn is told of Anakin's betrayal (or that he too is dead) and falls into this deep state of depression. In short, either she ends her life, or she dies of what I said earlier a broken heart.
Again, just a theory. But hey, I think the dramatic element for Lucas would really stand the test in the next film if she were to die. But here's another reason why I think this theory is to come....
If you were turning someone to the darkside, who already watched their mother die, and you were a Sith Lord, don't you think it would be benefitical to invoke one's rage by saying that the only other person they truely loved was dead as well?