Games Of Thrones Season 6: 9 Clues From "The Broken Man" Trailer
6. Sansa Goes To Houses Mormont And Glover

As promised, Sansa is up North rallying the remaining houses under the Stark banner, presenting herself as the head of the family and the figurehead of the rebellion against the Boltons. Even if Jon Snow's there to lead the army, she's very much the symbolic leader.
First she drops in on the Mormonts (hence the bear sigil in the background), who might not be entirely pleased with the Starks after Jorah was exiled...

It would appear the reception on the Bear Isle is frosty, since Sansa has to insist she had to do what it took to survive. That's either going to be in response to accusations of wanting to marry Joffrey, or marrying Tyrion, or Ramsay. You could take your pick really: she's had some problematic alliances.
And then she head to House Glover, where she meets Tim McInnerny's Robert Glover, who looks a lot more welcoming...

Hopefully, the letter she's seen penning is a response to Ramsay's love letter to Jon Snow. It's more likely to be a letter to the rest of the Northern houses, demanding they bring their banners out in support of the Starks.

Regardless of who it's intended for, it's definitely going to get into Ramsay's hands.