Serenity, I was thinking the same thing! If he took the rabbit out of the chair and replaced it with his mother, I would have said "perfect". Opus loved and yearned for his mother so, you would have thought that any peaceful innocent magical world he wanted to spend the rest of eternity in would have his mom there.
I must have missed how the clues would lead him to being in the book "Goodnight Moon". I wrote in thinking he would spend eternity as a child with his mom looking after him. They said out of 6,000 people, 50 or so actually guessed the ending right.
Dandelion snorting at my place next week.