During an interview with Vulture, the idea was floated that Sean could return to the show in a series of flashbacks, thanks to Bran possibly gaining the ability to peer into the past with the help of the Three-Eyed Raven. The possibility was news to Sean, but he’s definitely game for it.
“I'm [Bran’s] father, so that would be great fun!” Sean says. “Just to go back to that for a while, it would be such fun to do. It would be great! It would be bizarre, but it would be great! So I guess if they're going to do flashbacks, then yeah!”
Sean then quickly goes from being intrigued by the idea to full-on believing that it’s the right thing to do. “That should happen, shouldn't it? I've definitely got some unfinished business that needs to be resolved there,” Sean says. “You never know what [the showrunners] are going to do with that. It's got to be something special. But I'm into that. I certainly would be into that. Print that! Give them a nudge. [Laughs.] Hopefully I'll get a call soon.”
Your move, Benioff and Weiss.