Some idle thoughts after watching the trailer again: When Bran says: "Everything you did up until now brought you to where you were meant to be... home," could it be he's talking to Dany? Or even Arya? It doesn't quite make sense that he would be talking to Jon, as Jon had already returned to Winterfell before going to visit Dragonstone. The way Bran says "home," it sounds as if the person he's addressing has reached it either for the very first time, or the first time in a long time. Doesn't the first one describe Dany's situation? She was trying to get back to Westeros her entire life, doing things along the way that she likely now regrets. Now she's arrived, and even though it's nothing like she thought it would be, she's home.
Similarly, Arya had been away from home for a very long time. To get back, she had to train to be a killer and has killed dozens of people. She probably has regrets and doubts, and wonders who she truly is. Maybe Bran is assuring her that she had to go through that journey in order to be able to return to Winterfell.
Then again, he could be talking to Jon if Jon is expressing regrets about leaving the Night's Watch. But somehow leaving the Night's Watch doesn't feel as morally difficult (Jon did serve until his death, after all) as burning people to survive or mass-killing people to survive. Plus, Jon already went through this soul-searching in Season Six.