There must always be a Stark in Winterfell
I hope GRRM took notes on what worked and what didn't for when/if ever he finishes the books.
My 2 cents:
Bran can't be king. He's just gonna be the new Three-Eyed Raven.
Sansa can't be Queen in the North, unless she moves her court to the Dreadfort (there must always be a Stark in Winterfell) or pulls a QE II and says her children are Starks regardless of the father's family name. Or as apparently Maege Mormont did.
Same with Arya.
Rickon will probably end up being King in the North. It seems that's Lord Manderly's plan.
Jon could be the heir to Winterfell but if R+L=J is true, then he's aTargaryen, not a Stark. I guess him, Daenerys and Young Griff could be a throuple and be the kings and queen of the Seven Kingdoms (but that leaves out Arianne Martell).
Jaime's twist worked for me.