What if Jon Snow Looked Like A TARGARYEN? | Game of Thrones

We go through how the events of Game of Thrones would change if Jon Snow did not look like a Stark but a TARGARYEN. Instead of black hair and grey eyes, he has white hair and purple eyes. What would Ned Stark do with him next? Does he bring Jon Snow back to Winterfell? Does he leave him in Dorne with the Dayne's? Or does he go to the Neck with the Reeds? Does this impact the Lannisters plans latter on? Does Robert Baratheon find out?