What If Ned Stark Became KING? | Game of Thrones

We go through how the events of Game of Thrones would change if Ned Stark became King, instead of Robert Baratheon. What would King Ned's next move be, would there be on trial of Jaime Lannister or The Mountain? How would he get Robert Baratheon on his side after learning what happened to Lyanna Stark? Does Jon Snow come to King's Landing or go up to Winterfell? Does Tywin Lannister come back as the next Hand of the King?