Highlights from the original outline for GRRM’s ASOIAF:
Sansa marries King Joffrey, bears his son, and, Martin writes, “when the crunch comes she will choose her husband and child over her parents and siblings, a choice she will later bitterly rue.”
Tyrion Lannister falls in love with Arya, who only has eyes for Jon; this leads to “a deadly rivalry between Tyrion and Jon Snow.”
Daenerys Targaryen still marries Khal Drogo, who has no interest in capturing the throne of the Seven Kingdoms and kills her brother Viserys when he refuses to let it go. Presumably, Viserys is less of a jerk in this version than in the published book, because Daenerys actually kills Khal Drogo to avenge him.