The writers of Game Of Thrones finally threw fans a bone and reunited some Starks on Sunday when Bran arrived at Winterfell, where Sansa is currently serving as the Lady of the North while Jon meets with Dany in Dragonstone. Obviously, so much has happened since these two siblings have last seen each other, like Sansa's many trials and tribulations Bran's newfound title as the Three-Eyed Raven. Fans will remember that one of the biggest events to happen with the aid of Bran's all-seeing abilities was his vision of the Tower of Joy, where he found out that Jon Snow is actually the son of Lyanna Stark and Rhaegar Targaryen. So, will Bran tell Sansa about Jon's real parents on Game of Thrones?
Honestly, I hope he does because, how else is Jon going to find this damn information out? Obviously, it would make sense to think that if Bran told Sansa, she would pass this little tidbit on to her brother Jon via a letter and we would finally all be on the same page. On the other hand, the fact that Jon is not a Stark and is actually a Targaryen may mean complete chaos for Winterfell and its power structure right now. Bran is likely considering the fact that this revelation wouldn't be taken lightly by anyone involved. Jon's claim to Winterfell would be demolished and his identity would be thrown into oblivion along with it. I just don't see him and his newfound wisdom as the Three-Eyed Raven being so careless with this bombshell.
Personally, I am thinking that we may see someone else entirely find out about Jon's parents first. I am not particularly sure how this will happen, but perhaps its reveal could have something to do with Sam being tasked with a lot of meticulously taken notes about the history of Westeros at the Citadel. If he stumbled upon something like this, he would certainly share it with Jon, as his best friend.
Either way, with Bran and Sansa's conversation being so disconnected and unnerving under the Weirwood tree upon their reuniting, I don't see him divulging anything truly important to his sister just yet. Bran seems to be playing his hand close to the chest for now.