I saw it and smiled pretty much during the entire show. I don't want to call anything a 'clue' but there were items of interest such as 777, a spider and the evil Conformity which I have always maintained that a woman is involved in this hoax.
Here is an excerpt from wiki on it: https://en.wikipedia.org/wiki/Michael_Jackson%27s_Halloween
Characters[edit]
Michael Jackson (voiced by himself) - The King of Pop himself and a mysterious magical figure who creates 777 Jackson Street Palace Hotel who aids Vincent and Victoria in defeating Conformity, encouraging them to follow their dreams. Possesses the power to transform into various creatures and the ability to undo the effects of Conformity's magic.
When I first heard about this special I thought about the Halloween project that was written on that piece of paper we were given years ago - it talked about a sculpture.
Oh and one last thing, the air date of the special was the same date of the release of This Is It - October 27th. The world premiere of the movie was Oct. 28th, but select cities saw it on Oct. 27th.
Love you Michael!