There is no nighttime spectacular at AK like the ones at MK, EP, DHS. They do have Tree Awakenings at the Tree of Life that happen after dark, but you simply stand in front of the tree and wait for some magic to happen about every 10 minutes or so. Pandora is also incredible to walk through after dark, IMHO. The other shows - Festival of the Lion King, Nemo, the bird show - typically have their last showings in the afternoon. If you are interested in seeing the Tree Awakenings and/or Pandora at night, perhaps check what time sunset will be on your park date and also see when the park closes - I would then plan ADRs accordingly so you can see these attractions if AK is still open when it is dark on your park visit date.