Sansa was running through a dark, snowy forest. Reek looked corner in a dark, snowy forest. Brienne was killing men in a dark, snowy forest. Baelish was standing, doing nothing, looking suave in a dark, snowy forest. There's a theme, and it's no accident. The first three characters are all roaming about the same area of the North, while Baelish appears wherever he pleases. It would make sense for a scene that would unite all four of them. It's feasible to suggest Sansa and Reek are escaping, but the latter is captured by Boltons, Brienne steals in to save the day and rescue the pair, gaining Sansa's trust. Combine Sansa's crucial importance with Brienne's brawn and Baelish's cunning, and they could make a big move in Season 6.