Something just occurred to me.
The scriptures that Roslin are going by state that "a dying leader will lead the people to earth". Roslin assumes this is her, as she is dying and is a leader but does or has there been any mention as to Bill Adama's part in the scripture. He is also a leader and should be in there, right?
Just food for thought but what if the scriptures are not about humans at all but cylons. What if a Cylon dying leader is to lead the people to Earth?