His transformation to John Oliver is nearly complete!
EW's first look at Bran doesn't tell us much, but actor Isaac Hempstead-Wright did provide this hint:
Previously Bran’s seen tiny glimpses of future or past but never has he been very much in control in the situation,” he says. “Now we’re given looks into very important events in the past, present and future of this world and Bran is beginning to piece them together like a detective, almost as if he’s watching the show. Equally, he’s now discovering how crucial he could be in the Great War. It’s quite Inception-y.