Aw man, as a fan of animation and an artist myself, I gotta say I am insanely jealous of this. Glen Keane's artwork is amazing, and if this is real, the fact that he geocaches just makes me all kinds of happy. Whereabouts did you find that?
Glen Keane also did the animation and character designs for Ariel from The Little Mermaid and Tarzan, among many other characters!
It was from The Mummy's Treasure. I got it on 12.20.07. Based on the postcard, it was placed in the cache on 3.15.03 so it was in there for a while before I traded it.
It looks like Glen Keane left the postcard with the Beast on it and his father Bil Keane from "The Family Circus" fame placed an autographed book of the Family Circus cartoon in the cache. The book wasn't there when I was there and the cache wasn't in the best shape. There was water in it and it was cracked. Honestly, I'm surprised it is still there.
The log from the day the postcard was placed is from "TwoG's" and the cache is owned by "Two Guys and a Gayle". Bil's daughter/Glen's sister is named Gayle. There's also a Greg in the family. I'm not sure how exactly, but it all seems to be related somehow which would make sense since, according to Wikipedia, the Keane family moved to Paradise Valley, AZ (a couple miles down the road) in the 1950's.
How fortuitous it is that this cache happens to be in Phoenix, AZ as I am going there in two weeks! I may have to add this one to the GPSr just to say I found it! Anyway, I'm getting off topic here, but thanks for the info!