We looked at her life, her death, and her rise to become the Banshee Queen.
Kings are born like anyone else.
When last we looked at Sylvanas Windrunner, she had died at the hands of Arthas Menethil, servant of the Lich King.
The real stars of Heroes of the Storm are all the different characters from the varied Blizzard franchises you get to play in one hectic arena.
Although she's not necessarily heavily involved with Draenor, Jaina Proudmoore, leader of the Kirin Tor, has made her presence known. And her current behavior is slightly confusing to those that have read the novel War Crimes, but not necessarily out of character.