First Idea: MC is born a Stark. At least to his knowledge he was born as the younger twin brother of RobbStark. However, the reality would be that he is Jon's older twin brother. Ned would have taken them back to Catelyn and told her what happened with Lyanna. But, knowing that twins would be harder to convince people including her, he only told her that MC was Lyanna's only child and that Jon was a bastard. Catelyn and Maester Luwin were then sworn to secrecy so that no one would ever uncover his true heritage as the true heir to the Iron Throne. Much of the story can play out as it did in the series with the addition of MC. Robb and MC would have a loving rivalry being twins while he would feel kinship with Jon. He'd get along famously with all of his siblings and thanks to his parents genetics would be strikingly handsome.
Second Idea: Prince Aegon Targaryen was the second child and only son of Prince Rhaegar Targaryen and Princess Elia Martell. He was but a child during Robert's Rebellion and kept as a hostage along with his sister Rhaenys Targaryen and his mother, Elia Martell. To assure completely loyalty of the dornish forces in the war. During the Sack of King's Landing a fortnight after the royal forces had left for the Trident, Ser Jaime Lannister killed the Mad King in the throne room of the Red Keep. Jamie, though the only Kingsguard member left in the city, did not think his father Tywin, whose troops were attacking the city, would harm little Aegon and his young sister, Rhaenys. While Jaime was standing over the Mad King's corpse, Ser Gregor Clegane and Ser Amory Lorch scaled the walls of Maegor's Holdfast and then killed Aegon, Rhaenys and Elia. Or so it would seem. The apparent and unquestioned deaths of the children caused a great divide between Lord Eddard Stark and the new King Robert Baratheon I who were grand friends but for the moment turned bitter acquaintances. House Martell vowed revenge against House Lannister thus beginning their feud. Amidst all this, Lord Vary saw what was unfolding and hoping to secure the realms stability hatched a plan and found a child whose appearance was near identical to Aegon and thanks to Elia's poor health at the time swapped the babies and no one was the wiser. He sent the real Aegon away to safety in Essos with Prince Rhaegar's most trusted friend and confidant Lord Jon Connington. Being raised by him in secret until the day comes when he aims to reclaim his birthright.
Characters I am interested in playing against with no current plot. These may include some who are favoured and may be included in any plot.
Daenerys Targaryen
Sansa Stark
Margaery Tyrell
Cersei LannisterRobb Stark
Tyrion Lannister
Jon SnowOC x OC is also an option
