The alternate-history discussion forum has spawned two more interesting alternate-universe stories set in the realm of George R.R. Martin's A Song of Ice and Fire. One of them is a do-over story with an interesting twist, while the other is a more conventional what-if.
"The Northern Giant"-In this story, Sansa Stark poisons Petyr "Littlefinger" Baelish with the strangler poison she had in her hairnet at the lethal wedding of Joffrey "Baratheon" to Margarey Tyrell sometime after he says her father was a good man but a poor player in the game of thrones. This is something I've seen in fan-fic and in predictions for the next book before (the remaining poison is a Chekhov's Gun waiting to be fired), but not what happens next...
The dying Littlefinger wakes up nearly two decades earlier...in the body of Eddard "Ned" Stark the morning of his wedding to Catelyn Tully during Robert's Rebellion.
Now Littlefinger has everyone and everything he's ever wanted--power, respect, and Catelyn as his wife. He's also got all of Ned's experiences and memories, which could have some interesting consequences. He might find himself with honor and a conscience not deadened by years of bitterness and scheming, something that could make his evil-masterminding more complicated.
Plus the Battle of the Trident is looming. Hopefully his knowledge about what's to come will come in handy...
The Falcon's Last Cry-This diverges from canon when the dying Jon Arryn manages to warn King Robert Baratheon that "his" children are really bastards produced by incest between his wife Cersei Lannister and her twin brother Jaime. Robert is fortunately intelligent enough not to immediately warhammer them both, but this is something that needs to be dealt with quickly. Shenanigans and bloodshed within the Red Keep will be coming soon.
I like what the author does with Littlefinger in this story. Littlefinger's master plan is to sow strife in order to advance his own position (in addition to whatever it is he's been doing with the kingdom's money), not simply "keep Stannis off the throne" (his reason for betraying Ned in canon) or supporting the Lannister regime that has given him honors and power. Who knows the slippery little twerp will be up to this time around?