Just for the hell of it, I'd love it if they'd released replicas of the original AD&D texts. Gygax and the others could maybe throw in comments about where ideas came from or cool 'behind the scenes' type stories.
"I designed the rust monster after watching my cat eat tinsil off of my Christmas tree. I designed the creature's tail after watching tinsil dangle out of my poor cat's butt."
That, of course, was a fictional example, but you get the idea. It'd be kind of like a commentary on a DVD. Plus, brand new books with all that ancient artwork, etc.
"I designed the rust monster after watching my cat eat tinsil off of my Christmas tree. I designed the creature's tail after watching tinsil dangle out of my poor cat's butt."
That, of course, was a fictional example, but you get the idea. It'd be kind of like a commentary on a DVD. Plus, brand new books with all that ancient artwork, etc.