Some more details from the trailer I've not seen discussed, as requested, no gifs and image links to reduce load on the page.
Pretty clear that SSS is being used in the hair of the characters (could be very similar to the vegetation shader)
Nate under shadow
Nate under light
Two things to note in that scene, indirect lighting on Nate and his brother, as well as the wall, light bouncing originating from the light torch pointing downwards and the rock bouncing off the light towards Nate, Sam and the rock wall. And snow being rendered as 3D geometry on top of Nate/Sam jackets.
Another example of indirect lighting(the sss use on the hair of the characters can also be noticed here):
Scene without main source of lighting
Scene with main source of lighting
Hair shader examples from PSX 2015:
Sully/
Nate
And on the topic of reflections, this example shows signs of SSR, although much,
much cleaner than any other example I've seen(notice how the hand movement doesn't affect the reflection at all), to the point where it's not noticeable in motion:
http://gfycat.com/NaturalPeriodicAmurratsnake
tl;dr Cool stuff happening, NDs attention to detail is most probably self harming for the employees at this point.