While many people see Daenerys as the next true ruler of the Seven Kingdoms, Stannis Baratheon is probably the best of the rest. He's headed up to the North and saved the Night's Watch from an impending Wildling slaughter, and now he's after some form of control in the North. He didn't hint, he didn't imply; he straight up announced his plans to march on Winterfell and wipe out the traitorous Boltons, but he needs to grow his army if he is to do so, as he seems clearly intent on tapping into the thousands of Wildlings currently roaming without a cause beyond the wall.