Elise Reiner: Who is she?
Elise Reiner: A parasite. She befriended your astral body and lured you into the further just as Dalton has been.
In the scene when Dalton is climbing the ladder trying to turn on the light in the attic, it shows him stepping onto the same step twice.
In addition to the sketch of the puppet from 'Saw', there is a list of names for student presentations on Josh's classroom chalkboard. The director, James Wan, is on the list - apparently with two presentations due ("JAMES WAN x 2").