Status: True
The Wildlings fought valiantly with Jon in the Battle of the Bastards, and at heavy cost. (R.I.P., Wun Wun!)
Original Theory: The second season six trailer features fiery-haired wildling Tormund Giantsbane speaking very ominous words that appear to refer to Jon Snow's death . . . but most fans speculate that they are actually spoken to Jon, after he inevitably comes back to life.
Rather, the man Tormund was "wrong" about is Mance Rayder, the King Beyond the Wall — instead, it's conjectured that the wildlings will band behind newly revived Jon Snow (who has always championed for their rights) and join him in a battle for Winterfell.
