Someone uploaded the ending you get if you beat the Legendary difficulty on Halo 4. It's noteworthy mainly because it involves the briefest glimpse of a portion of Master Chief's true face, which might be a thing you want to see. Spoiler, obviously, although really the only thing being spoiled here is that yes, Master Chief does actually have at least part of a face.
I was already kind of operating under the assumption Chief had a face under there somewhere, so it's not so shocking to me. (Via Kotaku)